Florist or Grocery Store Azaleas

Potted azaleas are often sold at florists' shops and grocery stores. Frequently, they are gifted to people as a blooming houseplant. This article discusses if these azaleas are viable long-term, and will they bloom again?

Like winter-time poinsettias, azaleas purchased from florists or grocery stores typically are grown as short-lived houseplants. They are forced to flower in greenhouses with a tightly controlled growing environment, and it's a shock to the plant's system when it experiences the much different temperature, humidity, and light conditions in your home. Once the blooms fade, these plants typically get thrown away.

Proper care can extend the life of your plant. When you first bring your florist's azalea home from the store, remove any decorative outer foil or other wrapping from around the pot as this can inhibit drainage.

Select a location with bright, indirect light, where the temperature is between 60 to 70°F. Avoid placing it in areas that have dramatic temperature fluctuations.

Potted azaleas bought from stores usually are grown in peat moss that provides good drainage and correct acidic growth conditions. However, peat can dry out quickly if you forget to water the pot. If the potting medium feels bone-dry and plant leaves have drooped, immerse the plant pot in a container of lukewarm water for 15 minutes and afterwards drain the excess water from the pot.

Watering is a common reason for potted azaleas to die. The soil medium should not be too soggy or too dry. Allow the top half inch of potting mix to dry between waterings. Ideally, one should use bottled water or rainwater to hydrate your plant, as municipal water often is too alkaline.

Florist azaleas are almost always Southern Indicas varieties, and generally they cannot tolerate low temperatures. If low temperature is not a concern in your area, then with proper care they can be maintained to bloom again.

After the blooms fade, repot your plant into a larger container with drainage holes using an acidic soil mixture with a pH of 4.5 to 6.0. Purchased potting soil specifically designated for rhododendrons and azaleas works well. Deadhead the spent flowers and prune out any broken, dead, or diseased branches.

In order for these plants to bloom again, they need a chilling period of about two months with temperatures between 40 to 50°F. Commercial growers achieve this by keeping the plants in a controlled environment. One can replicate this by placing your plant in the basement or other suitable location. Reduce watering during this period, but do not allow the soil to completely dry out. After two months of cooler temperatures, move your plant back to a location with 60 to 70°F temperatures.

During the spring/summer months, the plant can be grown outdoors in a protected area. Harden it off gradually over the course of a week to 10 days, by placing the plant outdoors for increasing amounts of time. Fertilize with a product for acid-loving plants during active growth.

Bring your florist's azalea back indoors before first frost as exposure to low temperatures, even for a short time, will kill the plant. Bring it indoors for increasing amounts of time over the course of a week.

Alliums in your garden

Allium is a large and happy family - there are about 700 assorted aunts and cousins, all of whom are related by blood or marriage to the humble onion. Most are pretty hardy and there are varieties to suit almost every growing condition and the caprice of every gardener.

Allium flowers vary in size from cabbage (A. schubertii) to ping-pong ball (A. caeruleum). Height ranges from waist-high (A. giganetum) to little ankle-biting plants (A. forrestii). Colors range from bright yellow to many shades of mauve and purple to pure blue, and white.

Apart from A. schonoprasum (chives) most alliums are planted in the fall. They enjoy sun but hate wet feet in winter. Don't plant the large-flowered varieties too close together as they need room for those giant flower heads. Small-flowered ones can be closer together and left to form a clump.

Allium leaves look rather floppy and take time to die down in the fall, but planted among hostas, rhododendrons, other shrubs, or with ornamental grasses they are not too noticeable.

You can grow them from seed - your own, if you wish - for those big seed heads are loaded with little black seeds in the fall.

Kubota Garden

Kubota Garden is a stunning 20-acre garden composed of hills and valleys, featuring streams, waterfalls, ponds, rock outcropping, and an exceptionally rich and mature collection of plant material. This unique urban refuge displays over 60 years of vision, effort, and commitment by the Kubota family.  Master landscaper Fujitaro Kubota was a horticultural pioneer when he began merging Japanese design techniques with North American materials.

In 1927 Fujitaro bought five acres of logged-off swamp land in the Rainier Beach neighborhood of Seattle and began his garden. Fujitaro was a man with a dream, entirely self-taught as a gardener, he wanted to display the beauty of the Northwest in a Japanese manner and was soon designing and installing gardens throughout the Seattle area. The garden on the Seattle University campus and the Japanese Garden at the Bloedel Reserve on Bainbridge Island are public examples of his work.

As Fujitaro's landscaping business prospered, his Rainier Beach Garden grew to 20 acres in size. It was the family home, the business office, a design and display area and a nursery to grow plants. In the 1930's, a natural stream was enclosed in a pool and surrounded with maple, pine, iris, and stone. In the forties during World War II, the garden was abandoned for four years while the Kubota family suffered internment at Camp Minidoka in Idaho. Fujitaro and his sons, Tak and Tom, restarted the landscape business after the war and began extensive plantings of nursery stock. Many of these nursery areas are still in use today.

In 1972 the Japanese Government awarded Fujitaro Kubota with a rare honor, the Fifth Class Order of the Sacred Treasure, “for his achievements in his adopted country, for introducing and building respect for Japanese Gardening.”

Fujitaro died in 1973 at age 94. He had always hoped that the garden would one day be open to the public, both to enhance the quality of life in Seattle and to increase American understanding and appreciation of Japanese culture. In 1981 the American Japanese Garden, created by Fujitaro, was declared to be an Historical Landmark of the City of Seattle.

Rhododendron calendulaceum

Have you ever taken the Blue Ridge Highway and watched a full scene of flaming color.  It takes your breath away.  You are seeing Rhododendron calendulaceum in its glory.  It is one of the most spectacular native shrubs of the Appalachian Mountains.  E.H. Wilson, the notable British plant collector and explorer, wrote, "..."It must be considered one of the most gorgeous of American shrubs."  Why?

  • its unopened buds give a resemblance to candle flames,
  • its flowers are very showy and are larger than most other natives,
  • the color is termed fiery, was said to have alarmed early explorers who, upon viewing a whole hillside in bloom, thought they were ablaze,
  • colors range from yellow, yellow-orange, orange-red, and red, usually with an orange blotch on the upper lobe,
  • leaves are 1 to 3-in. long, medium to dark green above, with short hairs below, both leaves and branches often appear in whorls.

A little background surrounding this gem: calendulaceum means like a "calendula," a genus of flowering plants with similar flower color.  It is one of 16 species in Rhododendron subgenus Pentanthera, section Pentanthera, referred to as the deciduous azaleas. it's commonly called the "Flame Azalea".

It was first identified in 1795 by Andre Michaux, a French botanist, in the Southeastern U.S. and since has played an important role in the early development of the Ghent Hybrids, which began with its cross with R. periclymenoides.

This gorgeous gem forms an upright, spreading shrub or small tree, which can grow from 4- to 15-ft. tall in the wild. but usually is much shorter in cultivation.  Typical bloom time is May through June at which time you will find entire hillsides brilliantly colored.  Its native habitat includes open, dry sites in woods, on cliffs and hillsides, and on bald open area on mountaintops from 600 to 5,000 ft.  It is hardy to Zone 5 (-25°F or -30°C).

R. calendulaceum has close relatives! With the closest one being R. cumberlandense, a smaller plant with a paler flower.  The scarcity of natural hybrids may be due to it being a tetraploid. whereas other azaleas in its range are diploid.  Because of this genetic incompatibility, its hybrids are often sterile.

R. calendulaceum is difficult to propagate from cuttings, but it is very easy to grow from seed.

pH - Why is it important for rhododendrons?

What is pH? How do I obtain a proper pH for my rhododendrons?

pH refers to the acidity of a material. Technically, it is a measurement of the hydrogen ion content. The pH scale ranges from 0 to 14, pHs of 0 to 7 are acidic, pHs of 7 to 14 are referred to as being basic or alkaline. A pH of 7 means the material is neutral. For rhododendrons the preferred pH should be between 5 and 6.5.

It is difficult for a layperson to determine the pH of the potting medium they use. There are pH meters on the market, but the ones that cost less than $100 are practically worthless. However, it is fairly easy to get your growing medium pH in the desired range. Fir or hemlock bark is almost always in an acceptable range and, therefore, an ideal growing medium to use. It is best if the bark has decayed for six months prior to use.

The reason pH is important for plants has to do with the intake of minerals and nutrients. If the pH is too low, rhododendrons have difficulty taking in the nitrogen and phosphorous they need for growth. If the planting medium of soil is too alkaline, i.e. the pH is too high, it usually causes iron and/or manganese deficiencies.

In summary, pH is important for growing healthy rhododendrons. Generally, it is advisable to use fir or hemlock bark in pots and bark or pine needle mulch as an additive for plants grown in the ground.

Iron-Clad Rhododendrons

R. catawbiense was collected in the wild in 1803 in the Eastern U.S. and was introduced to Britain in 1809. When hybridized with other rhododendrons it introduced cold and heat hardiness into rhododendron hybrids. The first group of rhododendrons to become popular in gardens was the hybrids called the "iron-clads." There were a group of early British hybrids involving crosses of R. caucasicum, R. catawbiense, R. ponticum and R. maximum that survived the coldest winters at Arnold Arboretum in Boston. In 1917, Ernest Henry Wilson (1876-1930) published a list of what he termed the "Iron Clad" rhododendrons that for many years were successfully growing in the Arnold Arboretum.

 Wilson's Dozen Iron-Clad Rhododendrons

 1. Album Elegans, pale purplish pink hybrid or selection.
 2. Album Grandiflorum, pinkish white hybrid or selection.
 3. Atrosanguineum, bright red with purple markings hybrid.
 4. Catawbiense Album, pinkish white hybrid or selection.
 5. Charles Dickens, crimson red with purplish markings hybrid.
 6. Everestianum, purplish-pink with green markings hybrid.
 7. Henrietta Sargent, a deep pink hybrid.
 8. Lady Armstrong, deep purplish pink, pale center hybrid.
 9. Mrs. Charles S. Sargent, rose pink hybrid.
10. Purpureum Elegans, pinkish purple hybrid.
11. Purpureum Grandiflorum, violet with green flecks hybrid.
12. Roseum Elegans, lavender pink with green markings hybrid.

Rhododendron decorum

Rhododendron decorum was first described by Adrien Rene Franchet in 1886 from a plant collected in Moupin, western Sichuan. It was introduced to cultivation in 1887 by Pere Jean Marie Delavay. In the wild it can be found throughout west and southwest Sichuan, southeast Tibet, northwest Yunnan and northeast upper Burma. It grows in pine, spruce, and open deciduous forests, and on grassy mountains and rocky scrub. It is found at elevations of 6000 to 15,000 feet.

The foliage is variable but typically shaped oblanceolate to elliptic, up to 7" long, smooth green on both surfaces, with rounded ends. The funnel-campanulate flowers are white to pink to pale lavender, variously marked and quite fragrant. Held in an open-top truss with 7-12 flowers.

There are two subspecies, ssp. decorum and ssp. diaprepes, with the former having smaller leaves and corolla and fewer stamens.

R. decorum is quite variable in hardiness. Typical cold hardiness is 0°F (-18°C).

Plants in cultivation are easily grown and generally bloom at an early age. With a May/June bloom time and a pleasant fragrance, R. decorum is worth growing in your gardens.

R, decorum has found considerable use with hybridizers and many fine hybrids have been produced, including R. 'Caroline', 'Lackamas Spice', 'Newcomb's Sweetheart', 'Apricot Sherbet', and 'September Song'.

Rhododendrons In Bloom Today

Here in the Pacific Northwest, we've had a cold, wet and windy spring, so plants are late blooming this year. However, I've finally got a bit of good colour showing now in early April.

R. 'California Gold' is a R. maddenii hybrid, and tender for us so I keep this beauty in a container and bring it in whenever frost is predicted. It's a bit of a nuisance to do, but whenever I see it blooming, I'm glad I took the trouble. The large flowers are soft yellow with brown anthers that show up nicely against the petals. The outer edges of the petals are just a bit frilly, so really nice and, they have the added bonus of excellent fragrance. When in bloom, 'California Gold' perfumes the sunroom and adjacent dining room. One other attractive attribute is the dark red shedding bark.

R. 'California Gold'
R. 'California Gold'

R. 'Shamrock' is another pale yellow flowered hybrid in bloom today. Among my acquaintances, I find some people aren't impressed with 'Shamrock'. They think it's too pale with a bit too much green in the flower colour to stand out well. Well, that's just crazy talk! I think this is a sweet, tough little plant and I value it for its early blooms. It is often out in mid-March although this year it's a couple of weeks later. The parents are a dwarf form of R. keiskei and R. hanceanum nanum and 'Shamrock' has inherited their small stature. And, for those who wish it had showier flowers, put it next to something blue like 'Muscari' as the colour contrast is very attractive.

R. 'Shamrock'
R. 'Shamrock'

My third "bloomer of the day" is lovely R. dendrocharis. This species rhododendron has flat-faced, open flowers of bright pink. The leaves are tiny and very dark green. In the wild, R. dendrocharis usually grows as an epiphyte, so it needs excellent drainage. Other than that, I've found it easy to grow. I keep it where it gets dappled shade and protection from the noonday sun during the summer.

R. dendrocharis
R. dendrocharis

Rhododendrons: Not flowering

There are several reasons for rhododendrons to have few or no flowers:

  • Application of nitrogen-rich fertilizer can cause excessive vegetative plant growth and suppression of flower bud formation.
  • Plants pruned in the late summer or fall will have few blooms due to removal of flower buds. The proper time to prune is in the spring immediately after flowering has finished.
  • Cold weather can kill flower buds. Buds change color from green to brown. Select varieties cold hardy for your garden location.
  • Some hybrid rhododendron varieties do not bloom profusely every year.
  • Light is the primary factor that stimulates flower bud development.  Rhododendrons should be planted where they receive sufficient light so that they set flower buds, but not in too sunny a location that leaf damage occurs.

Variegated Evergreen Azaleas

Until recently, there were very few variegated evergreen azaleas available in the United States. These include the Satsuki varieties:

• ‘Keigetsu’. One of the earliest blooming Satsukis with light pink flowers and a red margin. The green leaves are flecked with white on a low spreading plant.

• ‘Uki-nishiki’. White flowers with many variegations of stripes, flecks, etc. of a dark purple. The leaves are flecked with yellow.

• ‘Shira-fuji’. The flowers are variable, generally white with purple variations. The leaves have an attractive distinct white margin on a dwarf plant.

• ‘Shinyo-no-tsuki’ sport. Very large white flowers with crimson blotches that bloom in June. The leaves sport cream stripes longitudinally throughout.

• ‘Fuji-no-mine’. A dwarf cultivar admired for its unusual foliage, the leaves are variegated with many flecks of yellow. Pink flowers with a darker circle that bloom in June.

American growers began introducing variegated azaleas in the late 1980s and early 1990s. One of the most popular and now widely available is ‘Silver Sword’, a sport of ‘Girard’s Rose’ with a distinct white margin bordering a dark green leaf. Other Girard plants with white margined foliage included ‘Girard’s Variegated Gem’*, a sport of pink-flowered ‘Girard’s Border Gem’*, and ‘Hot Shot Variegated’* with bright orange-red flowers. These varieties tend to have a lighter green color in their leaves.

Two southern varieties of the white-margined types discovered in the 1980s are ‘Southern Belle’, a sport of ‘Pink Ruffles’, and ‘Red Ruffles Variegated’. Another lovely choice is ‘Silver Streak’, a Greenwood hybrid with white-margined foliage and purple flowers; it is a sport of ‘Deep Purple’.

Finnerty Gardens

Finnerty Gardens has one of Canada's best collections of rhododendrons. The spectacular three-acre plot is tended by the Finnerty Garden Friends, a special group of University of Victoria alumni and community members who advise on the planning and development of the year-round garden.

The Gardens were developed when, in 1974, the estate of Mrs. Jeanne Buchanan Simpson of Cowichan Lake was left to the University. She and her husband George, beginning in the 1920's, built up a notable collection of rhododendron species at their Lake Cowichan home. Many plants were grown from seed obtained directly or indirectly from famous plant explorers of the day. Theirs was the largest rhododendron collection in British Columbia.

The Buchanan Simpson's gift transferred to the University the responsibility for the well-being of a significant collection of a popular genus among Victoria gardeners. The University decided to move many of the rhododendrons to the campus where they would form the nucleus of a new garden that was created at the south end of the campus.

The Simpson plants were up to 50 years old and presented a challenge to the transplanters. After the death of her husband, Mrs. Simpson had been unable to maintain the garden properly. The rhododendrons had to struggle for survival without the benefit of summer watering and in competition with the invading "jungle". You will recognize these sometimes distorted giants in the Garden today. Most of them are R. decorum or R. fortunei. In their growth-form they resemble these rhododendron species growing in their native Asian habitats.

The collection now includes more than 200 rhododendron species and azaleas along with an extensive planting of hybrids, most of them of early origin. The accession list includes about 1600 entries for trees and shrubs. All are catalogued and identified by a number that refers to a master list, which is available for veiwing

The rhododendrons may be seen in flower from mid-January until late June, also extensive collections of spectacular perennials from July onwards. Companion plants such as Garrya, Chimonanthus, Hamemalis, Mahonia and Eucryphia extend the season through most of the year.

 

Leopard's Bane Daisy

Leopard's Bane (Doronicum spp.) is a curious sight in the springtime garden. We tend to think of yellow daisies as a summer and fall plant, and they seem out-of-place among Bergenia, Aquilegia, and late tulips. That being so, they are welcome and cheerful sight when spring days are dull and rainy.

They are not fussy as to soil, just moisture retentive, but well draining, a nice mix of sand and humus suits them fine. Even though they mostly go dormant during the summer, they should not be allowed to dry out, and if planted in light dappled shade that should not be a problem.

They will naturalize in a woodland garden, and several of the named varieties do come true from seed. The rhizomes can be divided in early fall to share or replant. In fact, they improve if divided every four years or so. The blooms also last well when cut for the table.

Flowers come as single or double daisy forms, in various shades of yellow. Dwarf forms, such as 'Gold Dwarf' at only 10 inches tall, tend to bloom earlier in April. Blossoming then progresses through the doubles, such as 'Spring Beauty' and 'Gerhard', to some of the large flowered ones like 'Miss Mason' and 'Harpur Crewe' which bloom into June, and stand to 2 feet tall.

The heart-shaped basal leaves are a nice shade of soft green that contrasts well with dark rhododendron leaves, and if planted among Hostas, Astilbes, or Campanulas, their foliage will fill in spaces for the summer months.

Aren't we so lucky to have so many choices of undemanding plants that can fill gardens with color and beauty, and we hardly have to lift a finger to make them thrive?

Happy planting!

Warren Berg's hybrid Rhododendrons

Some outstanding Rhododendron hybrids were developed by the late Warren Berg, who had a wonderful woodland garden in Pt. Ludlow, Washington. Warren was a plantsman extraordinaire and very much a part of the great Rhododendron hybridizing community in the Pacific Northwest.

Warren was one of the plant hunters who joined trips into Asia, particularly China, just as China re-opened to western plant hunters in the latter part of the 20th century. He often used seed of species he'd collected to grow plants and evaluate their potential both for local garden use and as parents in crosses. He wanted to create good, easy to grow small plants for modern gardens. He also wanted nice foliage displays as well as a range of flower colours.

Warren named his cultivars so people would recognize the hybridizer, and want to collect as many of his cultivars as possible. He often used "bee" in the hybrid name – the "bee" coming from his last name. So, you'll find plants named 'Patty Bee', 'Peter Bee', 'June Bee', 'Honey Bee', etc. There are exceptions, depending on who was being honoured with a cultivar name, hence the plant names 'Ernie Dee; and 'Ginnie Gee'. One of my favourite rhododendrons is 'Golfer', named for Warren's wife Patricia who was an avid golfer. 'Patty Bee' was also named for her.

R. 'Patty Bee'
R. 'Patty Bee'

One of Warren's favourite parents for hybridizing was R. keiskei 'Yaku Fairy', a dwarf, yellow-flowered species from the Japanese island of Yakushima. In addition to providing small plant stature, this species gave him genetic material for his yellow flowers as well as good foliage. And, it was a plant that would cross readily with other species to provide a range of flower colours.

R. 'Wee Bee'
R. 'Wee Bee'

For yellow flowers, look for 'Patty Bee', 'Peter Bee', and 'Golden Bee'. Good pink forms are 'Wee Bee' and 'Too Bee', and forms that are white, or open white flushed with pink include 'Ginnie Gee', 'Ernie Dee', 'June Bee' and 'Wanna Bee'. For one of the most outstanding foliage plants around, you can't beat the aforementioned 'Golfer'. This cultivar has lovely pink flowers, but what I really love is the new foliage that is so covered by indumentum that it appears white. By the end of summer, as the foliage matures, the indumentum is gradually lost, but is replaced with attractive blue-green leaves. They are all "good do-ers" both in the garden or in containers. So, "bee happy" and treat yourself to one of Warren's beautiful creations.

Cinnamon and Nutmeg

The use of cinnamon has been well documented since ancient Egyptian times, but it is actually native to southern China and the Island of Ceylon. Its value, even in ancient times, was such that it has been an important trading commodity from time immemorial. It continues to be one of the most important spices of the world.

Cinnamon is actually the dried inner bark harvested from two trees: Cinnamonum zeylanicum, native to Ceylon and southern India, or C. cassia, from southeast Asia. In the wild, the trees are about 40 to 50 feet tall, but for commercial purposes, trees are grown in plantations where they are severely pruned to be kept just over 6 feet tall. To harvest, twigs are cut from the trees, and the bark is carefully peeled off the twigs to form "quills". The quills are dried by wrapping them around another piece of wood, and during the drying process, the cinnamon ferments slightly. After drying, the quills are unwound and cut to short lengths for sale, or ground into cinnamon powder.

Cinnamon oil can be distilled from the bark, and this is used as a commercial flavoring agent and in the perfume industry. Usually, no reference is made as to which form of cinnamon is sold in a given package, but in North America, the "cassia" form of cinnamon is more commonly available, while Europeans and Mexicans prefer the Ceylonese form of cinnamon. Both forms provide a spice with a rich, aromatic scent and flavor, but the cassia form is thought to have a more robust flavor and the Ceylonese form is more delicate.

Cinnamon is commonly used in baking, in some processed candies and also is often added to pickles. Cassia buds, dried fruit capsules of C. cassia, are also harvested and dried for use in making pickles. The buds have a more pungent flavor of cinnamon.

Nutmeg is the seed of the nutmeg tree, Myristica fragrans. A related spice, mace, is also harvested from the nutmeg seed, but it is the leathery coating that is found wrapped around the actual "nut".

Nutmeg is a medium-sized tree, native to Indonesia. It is now grown throughout southeast Asia and in the West Indies. Nutmeg trees are dioecious, that is, male and female flowers are borne on separate trees. In planting a nutmeg orchard, the grower must ensure there are enough male trees to pollinate the female flowers so about one in every 10 to12 trees will be a male pollinator. Only the female trees bear nuts.

As they ripen, the nut's outer husk splits open, revealing a kernel, wrapped in the mace. After the nuts are gathered the outer husk is removed and the leathery mace is carefully removed by hand. The mace is pressed and dried. The remaining kernel consists of a hard outer shell with the seed inside. These nuts are slowly dried and when curing is complete the hard shell is removed. The kernel within the "nutmeg" is the actual spice and it can be packaged whole or ground. Both nutmeg and mace are used for flavoring sweet dishes, but they are also commonly used to spice meats, fish, preserves, and other food.

Indumentum and Tomentum

Many rhododendrons have felt-like coatings on the top or bottom of the leaves. Composed of small hairs, the coatings can be white, tan, reddish brown or dark brown colored. See photos for illustrative examples.

     R. proteoides      R. 'Sir Charles Lemon'

Indumentum (Latin, literally: "garment") is a coating of hairs on the undersides of a leaf. Tomentum is a coating of hairs on the top surface of leaves. Stems and flowers can also be hairy, and this is generally referred as “tomentose”. A plant surface with any kind of hair is said to be “pubescent”.

Indumentum forms a protective, woolly layer that sheds water and/or provides leaf protection. During cold, dry weather, the hairy indumentum that covers the leaf's underside becomes an insulating shield. Some of the plant hairs hold water and absorb it to provide the plant with moisture in times of drought. During times of heavy rain, the hairs are used by the plant to transpire excess water from the surface of the leaf. Indumentum also provides some protection from insect damage.

R. smirnowii      R. roxieanum

Indumentum types include: Hirsute (hairy, shaggy, long-haired), Pilose (long soft hairs), Villous (shaggy), Stellate (radiating in a star-shape), Scabrous (small projections rough to the touch), and Scurfy (very rough to the touch).

Cardiocrinum giganteum

This summer I've had lots of nice things in bloom, but the plant that made my summer was Cardiocrinum giganteum, as my plant finally bloomed after six years. It was lovely to see and worth the wait.

The first time I saw Cardiocrinum in bloom was in a New Zealand rhododendron garden where it was growing as a companion plant. Well, everything grows in New Zealand, so there were seedlings coming up everywhere as well as having plants in all stages of growth throughout the garden. I remember tip-toeing along a path trying to avoid stepping on plants when the garden's owner said not to worry, they were something of a weed for him. The next time I saw the plant was in its native habitat in the Himalayas. Again, just a spectacular thing and it stuck in my memory as one of those "wouldn't it be nice to try and grow". So, when I was given a one-year old seedling in the spring of 2014 I planted it immediately.

The site I chose gets morning sun, but is shady by early afternoon. Soil is on the heavy side and holds moisture fairly well, only requiring watering towards the end of summer when drought really takes hold. The first couple of years, I put some copper strips around the leaf perimeter to deter any slugs, but by year 3, the plant was strong enough to take care of itself.

Cardiocrinum giganteum

 

As you can tell from the species name, Cardiocrinum giganteum eventually gets big. The heart-shaped leaves are held on a central upright stem. The stem dies down in the fall and each spring, the new stem grows taller and holds more leaves than the year before. This year, the stem emerged, set out some leaves, as per usual, then it took off and grew vertically fast. There were times I imagined I could actually see it growing. At about 8ft, flower buds formed at the stem apex in June with flowering in July.

Flowers are white flushed with red in the center, trumpet-shaped and spectacular. My plant only had about a dozen flowers, but I've seen pictures where an individual flower stalk has up to 20 or so. Apparently, the bulb can set offsets, so I'll leave everything alone until next summer to see if I'm lucky enough to get some new plants. However, this is one of those plants that blooms once, sets seed and then the old bulb dies. So, I will try to collect some seed and once ripened, I'll try starting some new plants.

Cultivar definition

Cultivar is a hybrid word constructed from cultivate (from Latin cultus, to care for or cultivate) and variety (from Latin varietas, absence of monotony). A cultivar is a plant type that has been propagated to show specific characteristics reliably over time.

Crossbreeding or hybridizing is the most common method for creating cultivars. Hybridizing two plants results in a large variety of genetic recombinations, called a "grex" for short. More commonly, the results are called "sister seedlings".

Usually the hybridizer wants a consistent set of characteristics to be repeated over a long period of time. Seeds will not do very well, though some seeds, particularly for vegetable gardening, are called cultivars. For plants like Rhododendrons, we want to be sure each plant has the exact characteristics the hybridizer chose.

To get them, they can be propagated several ways. The easiest for the amateur is to grow cuttings. By taking shoots of a desired plant and raising them in a soil mixture until they are safely rooted, it is possible to get a fairly large number of plants that are alike.

A more difficult method that can produce huge numbers of identical offspring is meristem culture. In meristem culture, unspecialized cells from buds are shaken apart and grown separately to produce entire identical plants. This is definitely not a method for the amateur. but it used by many nurserymen to get hundreds of one specific cultivar at the same time.

Another way to get a desired cultivar is by grafting, although the method is seldom used anymore. The method gets good, healthy plants that bloom well, but there is a major drawback. Rhododendron ponticum from Central Europe previously was used as the stock plant for grafting rhododendrons. Eventually the stock plant has a tendency to produce shoots from below the graft, slowly out-competing the grafted plant. The same problem occurs with grafted roses and a number of other grafted plants.

There are some other ways to get a cultivar, including air layering or ground layering, but generally the easiest way for most of us to get a particular desired cultivar is to buy it from a nursery.

Rhododendron thomsonii portrait

Joseph Hooker found R. thomsonii in 1849 while exploring in Sikkim, India. Other plant collectors subsequently found this rhododendron species in Tibet, Burma, and Nepal.

R. thomsonii grows to be a small tree up to about 20 ft. tall in its native habitat, but it is unlikely to get more than half that size in cultivation. Typical height in ten years is about four to five feet.

R. thomsonii has attractive foliage. The leaves are two to four inches long, rounded or orbicular shaped. The new growth has a quite noticeable blue cast that becomes greener as it matures, eventually becoming dark green on the top of the leaf and lighter-colored on the underside.

On older plants, the reddish smooth bark begins to flake or peel and makes a beautiful contrast with the mixed brown, fawn, and pink new bark being exposed by the old peeling bark. This bark-flaking characteristic occurs not only on the trunk of the plant but occurs on the larger branches as well.

R. thomsonii is slow to flower. Flowers are 2-3" across, bell-shaped held in a loose truss of about 3-10 deep red flowers that have a contrasting large waxy cup-shaped calyx. This calyx can be whitish-green, yellowish-buff or greenish scarlet. The plant blooms in April.

R. thomsonii does best if planted in a location protected from the afternoon sun and late frosts.

Rhododendron 'Naselle'

Imagine corollas of rose-pink with yellow centers and orange spots formed into large trusses on a nicely rounded rhododendron. This is 'Naselle,' which is named after both a town and a river in the state of Washington. By the way, the word Naselle was derived from a Chinookan tribe named Nisal.

The cross was hybridized by Jim Elliot in 1987. The Award of Excellence was given to 'Naselle' in 1992.

Description of 'Naselle': The new leaves are pale maroon. When they mature, the leaves are medium green and elliptic. Each large truss holds up to 15 beautiful corollas of rose-pink with yellow centers and orange spots, and it has been described as one of the most striking of the 'Lem's Cameo' hybrids. This hybrid is well-branched and looks rounded in shape. It will grow into a four foot high by four feet (1.2 x 1.2 m) wide plant in ten years, and can tolerate temperatures to 0 to -5°F (-18 to -21°C). With respect to its optimal placement in a garden, it does well with filtered sunlight, but enough sunlight to produce those wonderful blooms.

Looking Forward to Spring

Let's see... it's the middle of March, 2020, and everyone is trying to cope with the coronovirus pandemic. In my area, garden club meetings, plant sales and spring flower shows have all been cancelled. And, of course, the annual American Rhododendron Society Convention, scheduled for late April, has been cancelled too. These are all things I look forward to every spring.

But, there's still lots to anticipate. I've already seen Rhododendron 'Seta', 'Cilpinense', 'Cornell Pink' and 'Christmas Cheer' (see blog; 'Early Blooming Rhododendrons') in bloom at my house, and it looks like 'Mary Fleming' will open on the next warm, sunny day. Rhododendron buds are swelling and so are the lovely companion plants like Erythroniums, Trilliums, and Bloodroot.

I am lucky enough to have a warm, protected deck and I like to bring containers up to enjoy from my kitchen window. I mix and match the display depending on the state of blooms, and it usually ends up being a riot of colour. The picture below is from my deck in mid April, 2019. I'm already looking forward to this year's display as I expect it to be every bit as bright and cheerful. So, since we're all staying home for awhile, we can putter around the garden and enjoy our own gardens' private spring shows.

 

ARS Celebrates its 75th Anniversary

The American Rhododendron Society celebrates its 75th Anniversary with a return to the Portland area, where the Society began in 1945, to present a group of world-renowned keynote speakers and tours to the Northwest’s outstanding gardens and nurseries. Informative guest speakers include Jens Nielsen, Kenneth Cox, Lionel de Rothschild and Steve Hootman. Outstanding garden tours are planned to the Crystal Springs Garden, the Cecil and Molly Smith Garden and the Lan Su Chinese Garden. The 2020 Convention will also feature a plant sale, photo exhibit/contest, and rhododendron science poster session.

The six chapters of ARS District 4 will host the 75th anniversary Convention, titled "2020 Vision, Looking Forward Reflecting Back" to be held at the Heathman Lodge in Vancouver, WA on April 29 to May 3, 2020, with optional pre-tour, April 27-28, and post-tour, May 3-5. Non-ARS members are invited and most welcome to attend.

Companion Plant: Mahonia

The Mahonias, or Grape Holly, are attractive plants, that are easy to grow, have evergreen leaves, bright flowers, colorful fruits that are not poisonous or injurious, and have few pests. From groundcover to low shrubs to stately background specimens, there is a Mahonia for nearly any place in the garden. The flowers are most always some shade of yellow, often fragrant, sometimes powerfully so. Berries, in clumps or pendulous clusters, are in the blue-purple-black range, and make good jelly. Foliage is leathery, pinnate, spiny to one degree or another, often red-tinted when young, and sometimes coloring purple-red in winter,

For the very smallest groundcover type, look for M. repens (Creeping Mahoni), a suckering form only 12 inches tall that's very tough. A bit bigger, to 18 inches, with shinier, longer leaves, and also a spring to early summer bloomer, is M. nervosa (Cascades Mahonia). Taller again, 4 to 6 feet or so, also suckering into thickets of stems and blooming May-June, is M. aquifolium (Oregon Grape).

Native Azalea Species

Native azaleas that you might consider for your own garden:

  • R. canescens, also known as Sweet, Piedmont, or Florida Pinxter Azalea, blooms early in the spring. It is a large shrub, with fragrant, white to dark pink flowers. Hardy in zones 6b to 10a.

  • R. austrinum, the Flordia Azalea, is the first to flower in the spring and is indigenous to northern Florida and the coastal plains to Mississippi. Hardy in zones 6b to 10a.

  • R. canadense, or known as Rhodora, is a very hardy deciduous species native to Maine and eastern Canada. Flowers are rose-purple and have deeply cut petals in delicate trusses. An upright, compact plant with bluish-green leaves. 'Alba' is a white form. Hardy to -25F.

  • R. atlanticum or Coast Azalea forms a multi-stemmed upright plant with very fragrant flowers, white flushed pink or purple. It has bright, bluish-green leaves, hardy to -15F.

  • R. calendulaceum or Flame Azalea, flowers in brilliant shades of orange to red and, sometimes yellow, on an upright vigorous plant. Native to Pennsylvania and Ohio. This is a tetraploid with large-sized flowers, hardy to 25F.

  • R. flammeum called the Oconee Azalea is native to the lower Piedmont region across Georgia to South Carolina. Flowers are yellowish-orange to red. Hardy in zones 6b to 9a.

  • R. periclymenoides, formerly R. nudiflorium, is known as the Honeysuckle or Pinxterbloom Azalea. It is deciduous with unusual pink and white flowers that curve backwards exposing the style and stamens. Native from Massachusetts south to North Carolina. Very hardy to -15F.

  • R. vaseyi is one of the loveliest native azaleas. It is an upright plant with smooth tapering leaves. Also known as Pinkshell Azalea. The flowers range from white to pink, spotted red and bright yellow. The foliage in Fall becomes a great red color. 'White Find' is a choice white-flowered form. Hardy to -15F.

  • R. prinophyllum, formerly R. roseum, also known as Roseshell Azalea, has spicy fragrant flowers. Native from Quebec south through New England, and west to Tennessee, central Arkansas, and eastern Oklahoma. Flowers are pink to purplish pink. Very hardy in zones 4b to 9a.

  • R. viscosum or Swamp Azalea with a spicy fragrance to the flowers, can be pink or white. The flowers are long, slender, tubular, and sticky. This azalea tolerates wet and dry conditions, sun or shade, and offers good fall color. Hardy to -25F.

  • R. prunifolium or the Plumleaf Azalea, is a freely flowering plant with wide tubular-shaped blooms in apricot to orange-red. It like some shade and a moist environment, hardy to -15F.

Leonardslee Gardens Reopens

One of England's most renowned rhododendron gardens, Leonardslee near Horsham in West Sussex, has reopened after being closed to the public for nearly a decade. The Grade I-listed garden, first planted in 1801, features an outstanding spring display of rhododendrons, azaleas, camellias, magnolias and bluebells. Among Leonardslee's many treasures is the spectacular Rhododendron 'Loderi' hybrids, now more than 100 years old, created by former garden owner Sir Edmund Loder.

Restoration began when the present owner, Penny Streeter, OBE, acquired the estate in 2017. Penny and her team have restored and improved the garden and estate buildings for visitors to again see the garden's many rare and endangered rhododendrons and azaleas.

Leonardslee is home to a wide range of wildlife including foxes, rabbits, grey squirrels, badgers, weasels, stoats, shrews, voles, and its famous wallabies. The 240 acre estate has more than 100 free roaming deer. The Leonardslee wallabies were introduced by naturalist Sir Edmund Loder in 1889.

Vaccinium - Rhododendron Companion Plants

Huckleberry, blueberry, cranberry - that's what I think of when I consider Vaccinium, but actually throughout the world there are as many as 450 Vaccinium species, ranging from tiny creeping vines to large tree-like plants. We may not think of them as landscape material because of their more obvious food/farm value, but they have features that make them very attractive in any mixed garden.

My favorite is Vaccinium parviflorum, the red huckleberry (Zone 5). I can't walk through any of our local British Columbia forests in winter without marveling at the way they sprout from the tops of old cedar stumps like fanciful hats. The tracery of the delicate branches is magical in the early morning frosts. If I were lucky enough to have a woodland garden, I would surely have a stump upon which to seed one.

The highland blueberry, Vaccinium corymbosum (Zone 4) is native to eastern North America, and has been hybridized extensively for commercial food production in many parts of the continent. Red winter twigs to cut for Christmas decoration, apple-blossom pink flower clusters in spring, glossy foliage and luscious blue fruit in summer, and brilliant leaves of red and gold in fall all combine to offer more than many cultivated ornamental shrubs. There are early, mid-season and late fruiting varieties, and flavors from mild to sweet/tart for your discerning palate. They will all grow easily in moist acidic soil that drains well in winter, preferably in full sun, and need roughly a 5 x 5-foot space to mature. Pruning is rarely needed except for dead or damaged wood.

Another favorite is Vaccinium vitis-idaea, the lingonberry. A very hardy evergreen species (Zone 3), widespread in Arctic and alpine regions of Europe, Asia, and North America, it grows only about 10 inches tall and suckers to form a small thicket in sun or part shade. Typical tiny pinkish bell flowers turn to shiny red berries. The larger fruited form 'Koralle' is a prolific producer, and a smaller overall version, V. vitis-idaea ssp. minus, has deep pink flowers, and grows only 8 inches tall. Even if you don't care to eat these tart little beauties, they are highly decorative in the garden.

Happy Planting!

Rhododendron catawbiense portrait

Common names: Purple Laurel, Rose Bay, Catawba Rhododendron.

R. catawbiense grows in the wild in the mountains of Virginia and West Virginia to Georgia and Alabama, occasionally eastward to near the coastal plain. They are evergreen shrubs or small trees. Leaves are thick, leathery, dark green above, pale green beneath, shaped oval or elliptic, 2" - 5" long.

Flowers held in an umbel-like cluster, colored rose-purple to lilac, rarely white, with olive-green spots on upper lobe, not fragrant. Flowers bloom in May and June. Calyx lobes broadly triangular or semicircular, less than 1/3" long. Corolla rotate to campanulate shape, up to 2 1/3" across. Ten stamens; filaments purple, anthers white. Purple style about as long as stamens.

Cold hardy to -25°F ( -32°C). Widely used by hybridizers to create cold-tolerant hybrid varieties.

R. catawbiense
Photo by Rhododendron Species Foundation (ac77-620)

Origin of Pumpkins

Pumpkins are believed to have originated in North America. Seeds from related plants have been found in Mexico dating back to 5500 B.C.

The name pumpkin originated from the Greek word "peopon" which means "large melon". Peopon was changed by the French into "pompon". The English changed "pompon" to "pumpion". American colonists then changed "pumpion" to "pumpkin".

Native American Indians used pumpkin as a staple in their diets centuries before the pilgrims landed. Indians would roast long strips of pumpkin on the open fire and eat them. They also dried strips of pumpkin and wove them into mats.

When white settlers arrived, they saw the pumpkins grown by the Indians and pumpkin soon became a favorite food. Early settlers used them in a wide variety of recipes from stews and soups to desserts.

The origin of pumpkin pie is thought to have occurred when the colonists sliced off the pumpkin top, removed the seeds, and then filled the pumpkin with milk, spices, and honey. The pumpkin was then baked in the hot ashes of a dying fire.

Award of Garden Merit for Deciduous Azaleas

In 2016 the Royal Horticultural Society (RHS) Award of Garden Merit (AGM), the Society's highest plant accolade, was given to the following deciduous azaleas:

R. 'Chelsea Reach': large, double blooms, pale yellowish white, flushed purplish pink on an upright growing plant.

R. 'Crosswater Red': deep true red flowers, upright plant habit, good fall foliage color.

R. 'Gena Mae' long-lasting, double light greenish yellow flowers with orange edges and center.

R. 'Golden Oriole': flowers brilliant yellow with a deep orange blotch.

R. 'Jock Brydon': scented, large blooms, white with speckled reddish orange blotch, upright plant habit.

R. 'Parkfeuer': large blooms, vivid reddish orange, shaded vivid red.

R. schlippenbachii: broad, pale to deep pink blooms, rarely white, on a tall, upright plant.

The RHS reconfirmed AGM's for the following deciduous azaleas:

'Arneson Gem', 'Coccineum Speciosum', 'Daviesii', 'Fireball', 'Gibraltar', 'Golden Eagle', 'Homebush', 'Irene Koster', 'Jolie Madame', 'Klondyke', 'Narcissiflorum', 'Persil', 'Satan', 'Silver Slipper', 'Soir de Paris', 'Sunte Nectarine', 'Whitethroat', R. arborescence and R. vaseyi

All of the azaleas awarded AGM's are hardy to -4° to -5°F (-15° to -20°C).

Calla or Ethiopian Lily

The Calla or Ethiopian Lily has long been grown as a florist flower, popular at weddings and funerals alike, and easily recognized by the elegant, white trumpet-like spathes. Originating in several parts of Africa, the hardiest species, Zantedeschia aethiopica, can be grown in the garden in rich humus soil in full sun, with ample summer water, and is hardy to Zone 4. Growing from tuberous rhizomes, the glossy, arrow-shaped leaves stand upright to 3 feet, and a long succession of large, white blooms from late spring through summer emerge among them. The "bloom" is actually a modified leaf or bract up to 10 inches long, and the true flower is merely the yellow spadice arising from its center.

Selections have been made for more compact forms, as in 'Little Gem' and 'Apple Court Babe', only 18 and 24 inches tall; an extra hardy, stout-growing type, 'Crowborough', and the unusual 'Green Goddess', with bright green and white handkerchief-like flowers.

There are now interesting colored forms available, but these should be grown as potted plants or lifted in fall, as they are not all hardy. The Golden Calla, Z. elliothiana, has 4-in. blooms in a color range from cream to yellow through orange to deep rust and crimson. Leaves are heart-shaped, often spotted white, and stand 2 to 3 ft. tall. The Pink Calla, Z. rehmannii, has more linear leaves and has 2 to 4-in. blooms from blush thru pink to deepest royal purple. Wow! These make excellent accent plants for patios or conservatories, or may be planted in borders and lifted for winter.

The rhizomes of all can be divided in fall for plants to share, or plant again about 4-in. deep. Be careful to provide good air circulation to avoid fungal diseases, especially in cooler weather, and use caution when handling. The sap can cause skin irritation and all parts of the plant are poisonous to eat. The blooms make excellent long-lasting cut flowers and have no fragrance to compete on the dinner table.

Seven Dwarfs Rhododendrons

In 1977 I purchased from a local nursery which was closing forty R. yakushimanum hybrids, 20 cm tall in pots at what seems now a ridiculous price of 40p each. These remained in pots until we moved to our present garden at Radlett in Hertfordshire in 1982 when they were planted out.

Among this collection were a group named the "Seven Dwarfs", created by Percy Wiseman, the well-known hybridizer at Waterers Nursery. In the ensuing years, these plants have grown considerably and are not so dwarf anymore! The following descriptions are of interest to those starting a rhododendron collection in their garden.

'Bashful'
Registered 1971. R. yakushimanum x 'Doncaster'. Pale pink with a brown blotch. A very hardy plant, needs little attention and goes a long time without watering. Now measures 1.6 meter in height by 2.5 meter width.

'Doc'
Registered 1972. Half yakushimanum and half unknown. Pink. Awarded the HC in 1978. This is a fine plant with magnificent blooms and superb compact habit. One of my favorites, blooming in late May. Now measures 1.5 meter in height by 2.3 meter width.

'Dopey'
Registered 1971. Only a quarter yakushimanum with much other blood in its veins; facetum, dichroanthum and griersonianum. From its appearance one would think it had no yakushimanum in it at all. A deep rich red. Award of Merit 1977, FCC 1979. A favorite at Glendoick, I have read. While this is a fine plant, it suffers badly from mildew here in the South East in our long dry summers. Now measures 1.5 meter in height by 2.5 meter width.

'Grumpy'
Half yakushimanum, half unknown. Award of Merit 1979. Peach fading to cream. This is the only true semi-dwarf plant of the group suitable for a rockery or border. It is prone to bark split caused by the late frosts after periods of warm weather here in Hertfordshire. It has fine foliage with brown indumentum, and has a superb hummock-shape with the excellent tight round yakushaimanum-type truss. Only two of the original four have survived. These now measure 1.0 meter in height by 2.5 meter width.

'Hoppy'
Registered 1972. Half yakushimanum and quarter 'Doncaster' and quarter unknown. Award of Merit 1977. The name 'Hoppy' was used rather than 'Happy' as Rothschild registered a rhododendron of this name in 1940. This is also one of my favorite in flower opening pale lavender, fading to pure white. A wonderful sight in a woodland setting. This is "The Giant" dwarf which, in time, will grow into a plant of some size. Now measure 2.5 meter in height by 3 meter width.

'Sleepy'
Registered 1971. Half yakushimanum, quarter unknown, quarter 'Doncaster'. Pale mauve, spotted brown. This is the runt of the litter which I found very difficult to grow. Despite all my efforts, the leaves always showed signs of cholorsis, and the plants lacked any vitality and slowly died one by one probably due to our very dry summers. One plant, which I gave to a friend locally, survived but in a stunted, miserable condition. I have not seen this plant for sale in the nursery trade for some years which I think speaks for itself.

'Sneezy'
Registered 1971. Half yakushimanum, quarter unknown, quarter 'Doncaster'. This is an easy vigorous plant which layers very readily, with good dark green foliage but is not to my taste as it is a rather garish red/pink which fades badly in sunlight and does not sit easily with the surrounding plants in my collection. If you do try it, I suggest placing it amongst white flowering varieties. Now measures 1.7 meter in height by 2.8 meter width.

Amongst the others in the original collection were: 'Venetian Chimes', 'Percy Wiseman', 'Golden Torch', and 'Chelsea Seventy'. The first three have proved to be excellent garden plants, very hardy, keeping their semi-miniature stature. They are beautifully compact in habit, and will fit in every well with smaller garden schemes. 'Chelsea Seventy' while having a startling flower with strong dichroanthum influence has a leggy habit with not particularly inspiring foliage.

Rhododendron sargentianum

R. sargentianum, a dwarf rhododendron, was first introduced in 1903 by plant explorer Ernest Wilson who found it when he was hunting for plants in the mountains of western Szechwan, China. He found it a few other times growing in the same locality, in exposed areas, at elevations of nine to eleven thousand feet.

This is an ideal plant for a rock garden, or tucked into a little niche in your garden, because at maturity the plant is such a little gem. Plants grow to about 18 inches tall and about that wide; there may be some larger than that, but I've never seen one. They grow slowly but start blooming as small plants. Sometimes plants grown from cuttings will start blooming within two years. It is a twiggy compact plant with small aromatic leaves that are shiny green on top and densely covered with tiny rust colored or dark brown scales.

Typically this rhododendron species will bloom in April or early May. The flowers are small, narrowly tubular with spreading lobes that are held in little trusses of five to seven flowers. The flowers are either white, pale yellow, or lemon yellow. The yellow forms are in greatest demand, but many folks prefer the clones with white flowers.

R. sargentianum
Photo by Ken Cox

This is an alpine rhododendron and, like most alpine rhododendrons, it is absolutely essential that it is grown in a medium with good sharp drainage and in an open location. However, try to provide it with afternoon shade, as it doesn't seem to like the hot sun.

R. sargentianum is one of the finest dwarf rhododendrons you can have in your garden. In the spring it will cover itself with a profusion of flowers and when it is not in flower it is still an attractive little shrub. Don't forget that fragrant foliage! R. sargentianum does not look like a "typical" rhododendron and will be certain to add interest and variety to your garden.

Norfolk Botanical Garden Azaleas

The idea for the Norfolk Botanical Garden came from Thomas P. Thompson, Norfolk's first city manager, and Frederic Heutte, a young horticulturalist. Heutte had a fondness for azaleas and thought Norfolk had a climate uniquely suited for growing the plants. Thompson and Heutte believed that Norfolk could support an azalea garden to rival that found in Charleston, S.C., which even during the depression years drew thousands of tourists annually. The city of Norfolk provided Thompson and Heutte with a seventy-five acre section of high, wooded ground and another seventy-five acres of swampy land in the Little Creek Reservoir area to establish the garden.

Thompson, applied for a grant from the "Works Progress Administration" (WPA) to hire labor needed to turn a swamp full of loblolly pines and snakes into an azalea garden to border the new airport. Since most of the male labor force was at work with other projects for the city, a group of more than 200 African American women and 20 men were assigned to the Azalea Garden project. Laboring from dawn until dusk, the labor crew cleared dense vegetation and carried loads of dirt by hand to build a levee for the lake. The laborers were paid twenty-five cents an hour for their hard work. Within less than a year, a section of underbrush had been cleared and readied for planting. By March of 1939, four thousand azaleas, two thousand rhododendrons, several thousand miscellaneous shrubs and trees and one hundred bushels of daffodils had been planted.

To show the city's support for the Garden, the name was changed in 1955 from Azalea Garden to Norfolk Municipal Gardens. The city also selected Norfolk Municipal Gardens as the scenic backdrop for the International Azalea Festival, and for the annual festival that celebrates the member countries of the North Atlantic Treaty Organization (NATO). In 1958 the Old Dominion Horticultural Society took over maintenance of Norfolk Municipal Gardens and changed the name to Norfolk Botanical Garden. Today a garden visitor will find a quarter of a million azaleas on display!

Companion plant: Hamamelis

Winter flowering shrubs in a garden can really help to lift your spirits on those dark, dreary...and often incessant rainy days from December to the end of February. Some of the very best winter flowering shrubs are the Hamamelis or witch hazel plants.

These plants start blooming after the leaves have dropped in the fall and carry right through into March. Many of you may be familiar with Hamamelis mollis which is yellow in color. The flowers have four petals which are very small short straps of color close to the stem. These flowers are remarkably weather hardy and withstand cold spells...even snow. They bounce back after mild frosts although long periods of exposure to frost can turn them to brown mush.

Many different varieties of Hamamelis are available at your local garden center. The best time to shop for these plants is during the winter months when the garden centers usually showcase what is in bloom. They will often have Hamamelis plants in full bloom at the entrances to the sales area in order to attract customers. Who wouldn't be tempted? Hamamelis plants are not cheap! One has to pay a fairly high price compared to other plants...but they are worth it. Hamamelis are easy to grow and reward you each year with an excellent display of winter color. Small one-gallon plants can cost about $10-$14, while a two-gallon about $20-$24. Plants that have been field grown and recently dug can cost about $35 to $60, depending on size.

The witch hazels come in a variety of flower colors...ranging from the pale yellows ('Pallida') through burnt ambers ('Jelena') to a deep red beauty ('Diane'). Many varieties have a strong and pleasant fragrance. 'Arnold Promise' performs well in the garden, flowers heavily, and its light yellow flowers are scented.

Witch hazels can be grown in most soils that are slightly acid or neutral. They should be grown in either full sun or light shade. They are a natural woodland plant, can grow to around 4m with age, and require very little attention by way of pruning. Witch hazels have gorgeous fall foliage color...ranging from yellow to orange and even red depending on the variety.

Hamamelis species come from North America (H. virginiana), from China (H. mollis), and from Japan (H. japonica). The Chinese and Japanese Witch Hazels are the parents of many hybrids that are available in the nursery trade today. Early settlers in America used the whippy stems of H. virginiana for water divining. Its powers are considered to be derived from its similarities to Corylus, the hazelnut.

Rhododendron arboreum

R. arboreum is possibly the most widespread rhododendron in the world.  The plants grow in the wild in southeast Asia occupying a wide arc on the southern slopes of the Himalaya Mountains, from Kashmir through Nepal, Sikkim, Bhutan, and Manipur, a distance of about 1,500 miles.  In its native habitat some arboretum forms can grow up to 60 feet tall, but in cultivation, it rarely grows over 40 feet.  Most experts say it will grow to be about 6 ft. tall in 10 years. So don't let its mature height keep you from planting one in your garden.

The leaves of R. arboreum are large; 4 to 8 in. long and up to 2 in. or more wide. They are thick and leathery. Arboreum leaves are glossy, deep green on top, with the underside covered with a thin plastered or woolly indumentum that varies in color between different subspecies. The color of the flowers varies considerably, from white to shades of pink or red. Some of the white and pink forms sometimes will have deeper colored spots which add to their interest and beauty. All have nectar pouches at the base of the flower. Flowers are bell-shaped and are held in trusses of 15 to 20 flowers. The blood-red forms are generally considered to be the most tender.

Since the British Empire previously occupied much of the area where R. arboreum grows, and much of the early rhododendron hybridizing occurred in the British Isles, the species has been often used as a hybrid plant parent. Arboreum seed was first sent back to Britain from Nepal almost 200 years ago. Some examples of hybrids where R. arboreum has been used as a parent include:

R. 'Bibiani', ('Moser's Maroon' x R. arboreum ssp. arboreum)

R. 'Cornubia', (R. arboreum ssp. arboreum, red form x Shilsonii Group)

R. 'Doncaster', (R. arboreum ssp. arboreum x unknown)

R. 'Loders White', (R. arboreum ssp. cinnamomeum var. album x R. griffithianum)

R. Nobleanum Group, (R. caucasicum x R. arboreum ssp. arboreum)

Rhododendron leucaspis

Last year while attending a local rock and alpine garden show, I saw Rhododendron leucaspis in bloom for the first time and it immediately went to the top of my wish list. I looked around for a plant locally without success and had to put it on the back burner. So time passes and a few months later, I'm on my way to the ARS western regional fall conference in Newport Oregon and on the way there I decided I wasn't going to buy any plants, (Yeah, right!) as I was going to be on the road for a few days before heading home, and didn't want to have to fuss with looking after plants and deal with the border crossing. But, wouldn't you know it, the first plant I spotted on the Rhododendron Species Foundation's sales table was R. leucaspis, and I just had to have it - so much for resolutions about not buying anymore plants!

The plant I saw at the rock and alpine show is wintered under cover. The grower, a fellow "rhodoholic", thinks it might be a bit tender here in Victoria and I didn't want to take any chances with my new plant, so I over-wintered it in my sunroom - probably a good idea as this past winter was longer and colder than we've had in awhile. I've since learned from others that they're able to grow R. leucaspis outside reliably, so it is probably totally hardy in zone 7. My new plant was loaded with flower buds and blooming started in mid-February. It finished blooming at the end of March and in addition to lovely white flowers, to my delight, the flowers had a light fragrance, most noticeable when the temperature rose.

R. leucaspis is a small plant with clear white flowers. The stamens are very dark and stand out against the white petals. The petals are slightly reflexed, giving the flowers a nice, open appearance. Flowers are about 2 inches across and are held two or three to a truss. The plant itself has "smallish", dark green, slightly hairy leaves which provide a wonderful background to the white flowers. The plant height is about 2 feet in ten years. Since it is a small plant, I intend to keep it in a container, at least for now.

There are lots of great reasons to attend the ARS conferences: nice people, good talks, wonderful gardens to visit and the plant sales. I have no regrets that I didn't stick to my resolution of not buying another plant! I've made the same resolution about not buying anything at the 2017 Eureka ARS Convention, but I wonder what treasures I'll find and just have to have?

Legal-tender Rhododendron Coin

In September 2012, the Royal Canadian Mint released the $20 Rhododendron Blossoms Pure Silver Proof as the third coin in the Crystal Dewdrops Series and Wildflower Series and the eighth release in the Swarovski Crystal Flora Program. The image is that of the Pacific rhododendron (Rhododendron macrophyllum) from the North American Pacific Coast, which is enjoyed in gardens across much of North America. The Water Lily Pure Silver Proof (2010) was the first in the Crystal Dewdrops Series and the third release in the Swarovski Crystal Flora Program, while the Wild Rose Blossoms Pure Silver Proof was the second in the Crystal Dewdrops Series and the fifth release in the Swarovski Crystal Flora Program.

Rhododendron coin

The coin's special features are an artistic rendering of two pink-coloured Pacific rhododendron flowers and a bud, three crystals nestled among the rhododendron's petals and leaves, a Finish Proof, a limited mintage (10,000), and a composition of fine silver (99.99% pure).

The coin comes enclosed in a maroon flock-lined clam-shell case, is protected by a black sleeve and has a serialized certificate to document its quality. The coin weighs 31.39 g (1.11 oz US) and has a diameter of 38 mm (1.5 in).

Rhododendron Winter Damage and Prevention

Frost causes considerable damage to leaves, stems, buds, and flowers of some rhododendrons. On damaged plants leaves will be distorted, curled, and may grow only on one side of the main vein. Part or all of a winter-damaged leaf will be brown-colored. If too unsightly, remove the damaged leaves.

Some rhododendrons protect themselves from winter dehydration by drooping and curling their leaves as temperatures decrease. Leaf movement occurs rapidly and it is reversible as temperature warms.

Frost also will cause the bark of affected stems to split longitudinally near ground level...even peeling away. This typically happens in early fall or late spring when the plant is not fully dormant. Often these symptoms are overlooked and damage only noticed at a later date. If noticed recently after the injury and before the bark has had time to dry out the area can be wrapped with galvanized wire or a non-sticky wrapping. Check the wrapping monthly and remove the wire when the repair is successful.

Cold weather may cause branches to appear to be dead. Wait until late spring then scratch the bark on dead-looking branches. If there is green wood underneath, the branch is still alive, leave it in place. If it's brown underneath, the branch is dead and can be pruned off.

Cold weather can kill flower buds. Dead buds are brown-colored and easily break off. Often rhododendron buds are less hardy than other parts of the plant. Choose varieties that are bud cold-hardy for your area.

Because rhododendrons roots are very shallow, it's important to use a thick layer of mulch to provide protection from the cold. It'll also slow water evaporation from the ground, helping plants to stay hydrated. On warm days water your plants so they have a chance to survive cold periods.

A windbreak made from burlap, lattice or a snow fence can help prevent damage from winter's drying winds.

Finnerty Gardens

Finnerty Gardens has one of Canada's best collections of rhododendrons. Located on the University of Victoria grounds the spectacular garden contains over 4,000 different trees and shrubs with more than 1,500 rhododendron and azalea plants, including 200 collected rhododendron species, and a wide range of companion plants artistically displayed on a 6.5 acre site at the southwest corner of campus.

The Gardens were developed in 1974 when the estate of Mrs. Jeanne Buchanan Simpson of Cowichan Lake was left to the University. She and her husband George, beginning in the 1920's, built up a notable collection of rhododendron species at their Lake Cowichan home. Many plants were grown from seed obtained directly or indirectly from famous plant explorers of the day. Theirs was the largest rhododendron collection in British Columbia. The University decided to move many of the rhododendrons to their campus where they would form the nucleus of a new garden that was created on nearly three acres of land at the south end of the campus.

After the death of her husband, Mrs. Simpson had been unable to maintain the garden properly. The rhododendrons had to struggle for survival without the benefit of summer watering and in competition with the invading "jungle". The Simpson plants were up to 50 years old and presented a challenge to the transplanters. You will recognize these sometimes distorted giants in the Garden today. Most of them are R. decorum or R. fortunei.

The gardens have been carefully planned and developed to provide a rich and changing array of colour, scent, form and texture all year round. In April and May, you will see the rhododendrons at their best. For a plant identification guide and map of the gardens, download a self-guided walking tour pamphlet. For more information about Finnerty Gardens visit their website.

Little Sweetheart Rhododendrons

Much as I love the big, bold, beautiful Rhododendrons, I have a small garden so I grow mostly small species and hybrids. Some of my all-time favourite species are R. pruniflorum, R. sargentianum and R. campylogynum. As container specimens, all have been reliably hardy for me in the Victoria area for many years and all are easy growers.

I started with small well-rooted cuttings, originally grown in 4 inch pots and over time, have moved the plants up to larger containers. The current pot size capacities are, more or less, 3 gallons. My potting mix is coarse peat, perlite, some coarse sand and if I've got it, a bit of garden compost. I do want a well-drained mix, so there's no more than about 40% peat in the mix. I know many people are cautious about fertilizing some Rhododendron species, but I give my container-grown plants a light application of slow release fertilizer in the early spring. Since they're in pots, there's considerable leaching so I think some fertilizer is appropriate. Some of our local growers just top dress their potted rhododendrons with Seasoil (a form of composted fish fertilizer) once each spring, and this works well for them.

I keep my plants in a location where they get full sun in the morning, but by about 1 pm, they are in the shade. Good light is needed to set flower buds, so if you have some of these smaller species and they're not blooming for you, perhaps a bit more light is in order. I water freely on an as needed basis, and I make sure the drainage holes remain open since there can be problems with containers if they're sitting directly on the soil surface where the holes may gradually get plugged. I like to have some sort of top-dressing on the soil surface to prevent too much surface compaction from all the watering I do. A good layer of orchid bark makes an attractive mulch, but sometimes I use turkey grit, or small-sized pea gravel. However, if you like to show your plants, most show judges prefer to see bark mulch used as a top-dressing as they often think write comments that they think gravel isn't aesthetically suitable for rhododendrons. Personally, I like the look of gravel or grit and it lasts longer than orchid bark.

Rhododendron pruniflorum has thimble-sized bell-shaped flowers of a dusty plum colour. It's absolutely adorable in bloom. The leaves are small, a nice dark green on top and white underneath. My 6-year old plant is about 18 inches tall and 18 inches wide. Many of us grow R. campylogynum and there are several forms available - all of them are very nice. But, my favourite (and I have a couple of forms) is R. campylogynum Leucanthum. Again, the thimble-sized flowers are bell-shaped, but in this case they are white in colour. Rhododendron sargentianum has small, ball-like trusses of white to ivory coloured tubular flowers. The tiny leaves are a nice shiny green and if crushed, give off a scent. The scent isn't unpleasant, but it makes me sneeze. I have a plant of the straight species, but recently acquired a plant of the selected variety 'Liz Ann' which is stunning in bloom as it just covers itself in pure white flowers. These plants are also about 18 x 18 inches and range in age from 3 to 7 years old.

A very similar looking plant to R. sargentianum is R. primuliflorum, but, with primuliflorum, the tubular flowers range in colour from white to soft pink and even yellow. It also has scented foliage. I've just recently been given a pink flowering form of R. primuliflorum and I'm looking forward to seeing it in bloom next spring.

One of the advantages of growing plants in pots is that I can move them onto the porch when the plants are in bloom, so while the plants and their flowers are small, I can get up close and personal with them easily. You know the adage, great things come in small packages, so if you only have a small garden, consider growing some of these lovely little sweethearts.

Selecting Rhododendrons For Your Garden

Over 30 years ago I purchased my first rhododendron for a Mother's Day present.  I still have a vivid picture of proudly presenting it to my mother on Sunday morning, after selecting it the day before from a local nursery.

Like most beginners I was looking for a big plant with lots of blooms that didn't cost any more than a 16-year-old boy could afford.  However, with the passing of time I now realize I was fortunate to have purchased a quality plant without really knowing what I was doing.  Today, when I purchase a new variety, several criteria come to mind before I make my purchase.  The following general topics are not necessarily in any specific order...but seem to be worth consideration prior to selecting a plant.

Learn about climate. Get knowledge of local climatic conditions, with special attention to the most extreme winter temperature in the past five years.  This extreme cold temperature is critical as most rhododendrons sold are rated for hardiness.  The hardiness rating is a generally accepted temperature that the plant will endure and survive.  Notice: I said the plant...and not the flower buds.  The rationale behind plant hardiness is that you can afford to lose the buds on a given year, but not the plant.

Talk to local gardeners.  Talk with neighbors and rhododendron club members about varieties that they have had for several years.  Discuss with them how frequently the plant flowers, when it blooms, and where in their yard they have it located, i.e., in partal shade, in full sun.

Read about rhodies.  Background reading about rhododendrons on the world-wide web or in one of the reference books is helpful.  Several of the books have many excellent color pictures.  Would recommend any of the following authors as good resources: Van Veen, Greer, and Cox.  Each of the authors provides good description of flowers, plant habit, bloom period, and hardiness in a very understandable form.

Visit nurseries.  Visit several local nurseries, if available, to view their selection of rhododendrons.  Find a rhododendron knowledgeable sales person and seek opinions about varieties that do well locally.  Generally, retail nurseries tend to sell "tried and true" varieties that have stood the test of local time.  Frequently, your choice will be quite limited in the number of different varieties that are available.

When you have all of the general information identified and are ready to make your selection...that one plant to be located in that special place in your yard...suggest you have the following in mind:

Ultimate Size.  How large will the plant be at 10 years of age.  Standard varieties are about 6 ft. at 10 years.  Semi-dwarfs are about 2 to 4 ft. at 10 years, and dwarfs are about 1.5 ft. at 10 years of age.

Plant Age.  Know the plant size you want to purchase.  Are you after instant landscape...or are you willing to strat small and allow the plant to go over time.

Location.  Know the variety you want meets the conditions of your location, i.e., full sun, semi-shade, etc.

Plant Health.  When you make the final choice, the foliage of the plant you select should be green and healthy looking.  It should not have burned or spotted leaves.  Burned leaves generally result from inadequate water in the summer, or excessive cold in the winter.  Leaf spotting typically results from some disease condition.  Stay away from lopsided or crooked plants.  The leaves should be free of insect damage.  Notching around the border of the leaves generally indicates weevil activity.  Other insect damage is evidenced by irregular holes in the leaves.  If you want the plant to bloom in the coming season, look for large flower buds on some of the branch ends.

Personally, I realize that initially all of the above takes a great deal of time...but your labors dramatically increase the chance of purchasing an excellent rhododendron.  All too often we buy the plant with the big open flowers, only later to realize, it was a mistake.

Growing Media pH

What is pH, and how do I obtain the proper pH for my rhododendrons?

The term "pH" refers to the acidity of a material. Technically, it is a measurement of the hydrogen ion content.  The pH scale ranges from 0 to 14 and pHs of 0 to 7 are acidic - pHs of 7 to 14 are referred to as being basic or alkaline.  A pH of 7 means the material is neutral.

The experts indicate rhododendrons prefer an acidic medium.  The preferred pH should be between 5 and 6.5.

It is almost impossible for a layperson to determine the pH of the potting medium they use.  There are pH meters on the market...but in my experience the ones that cost less than $100 are practically worthless.  I have yet to try one that is better than plus or minus 1 pH.

But...all is not lost.  It is actually fairly easy to get your pH in the desired range.  Fir or hemlock bark is almost always in an acceptable range and, therefore, an ideal medium to use.  It is best if the bark has decayed or mulched for six months prior to use.

The reason pH is important for plants has to do with the intake of minerals and nutrients.  If the pH is too low, yes, soil can be too acidic, the plants have difficulty taking in the nitrogen and phosphorous they need for growth.

The foliage will not be the rich green that you expect.  Adding lime to the medium or the soil will raise the pH and help this condition.  Too low pH can occur when soil has been fertilized heavily for years.  The fertilizer frequently increases the acidity of the soil...that is...it lowers the pH.

If the planting medium of soil is too alkaline, i.e. the pH is too high, it usually causes iron and/or manganese deficiencies.  These deficiencies result in chlorosis - a condition where the veins may remain dark green - but the spaces between the veins will be yellow...the leaves are said to be chlorotic.  To remedy this condition sulfur is often applied for a quick fix.  Good mulching will also help in the long run.  A decomposed mix that would not use up the nitrogen in your fertilizer is best.

In summary, pH is important but your plants will tell you if you have a problem.  Generally, it is always best to use bark in pots and bark or pine needle mulch as an additive for your soil...and you will rarely have a problem.

Companion Plant: Viburnum bodnantense

The winter-flowering Bodnant viburnums are tall, fairly narrow shrubs which have bunches of tubular pink flowers on leafless stems. They bloom in late winter and have frost-resistant blooms which stay for weeks and are quite fragrant.

The species name 'bodnantense' refers to Bodnant Gardens, North Wales, where the hybrid was raised in 1935. The Bodnant vibumum grex (a grex denotes all the offspring of a particular cross) is a cross of the Chinese viburmum farreri with the Himalayan viburnum grandiflorum and, includes the cultivars 'Dawn', 'Charles Lamont', and 'Debian'.

'Dawn'...often called 'Pink Dawn'... is commonly grown and is widely available. 'Charles Lamont' has dark pink flowers which are somewhat larger than 'Dawn'. 'Debian' is tall and has a stiff habit with slightly fragrant whitish flowers which turn red with age.

'Dawn' is a deciduous upright shrub, 2-4 m. (6-12 ft) in height. It blooms in Fall and Winter after the leaves have fallen. Before they fall, the leaves turn a burnished bronze color. Red buds open to fragrant pink flowers that fade to white flushed with pink as they age. Wet weather and frosts may limit flowering display. Branches can be forced inside for a winter bouquet. The fragrance indoor may be somewhat overpowering.


Photo by Giraffenigel

'Dawn' is not particular as to its location, liking sun, but also doing well in partial shade. It enjoys acid, well-drained soil, but does well enough in other soils. It is fairly cold-hardy...but requires a protected placement where the chilliest winds won't hit it at temperatures below zero degrees F. Overall, this hybrid is very adaptable.

Since the plants are fragrant, grow them near a path you are like to use frequently. You will be rewarded! Otherwise, you won't appreciate the scent at a time of year when you're less inclined to go down a damp cold garden to smell it. The flowers have a pleasing perfume. The new leaves get so large that the blooms occurring the rest of the year can pass unnoticed. The leaves smell like citrus if crushed or bruised.

Fertilizer Nutrient Elements

A bag of fertilizer has three numbers prominently featured on the label...something like...5-2-0. It's important to know what those numbers mean because the wrong combination can do more harm than good. The numbers indicates the amount of three major plant nutrients: nitrogen, phosphorus, and potassium, abbreviated NPK.

One way to remember what those things do, and keep them straight is the phrase "up, down, and all around." Nitrogen is needed for green, leafy growth...the up. Phosphorus helps produce healthy roots...the down. Potassium is important for overall plant health and resistance to water or insect stresses, so it's...the all around.

Plants need anywhere from 14 to 18 plant nutrients for best health and production. Magnesium and sulfur comprise the macronutrients along with NPK. The micronutrients include: iron, manganese, boron, zinc, copper, molybdenum, and maybe chlorine. Testing your soil is the way to determine what is needed.

Success With Heathers

The singular species, Calluna vulgaris, inhabits large portions of Europe and northern Africa, from Siberia to Morocco, in vast tracts of open land and hillsides. The predominant flower color is purple...but it sports out in pink, red, and white. For well over 100 years, avid plants men have made over 500 selections of form, bloom, and foliage variations, and some of them are real eye-poppers!

Now, if you are one of those people that think that they always look so ratty, I am about to show you the error of your ways. Site selection is probably the most important factor. These are ericaceous plants...in the same family as rhododendrons...and like them, we should take our lessons from Mother Nature. Full sun is an absolute must and some slope to the ground is very beneficial. Soil should drain well, but retain some moisture, especially in summer during bloom time, anywhere from July to November depending on cultivars. An acid, humus-rich soil with no manures or strong fertilizers is necessary...a lean media keeps the growth compact. If you cannot engineer even a bit of a slope, then be sure that the soil is deep and loose. And then...prepare to PRUNE!

Ok, ok, and ok! I know no busy band of elves prunes on the moors, but truth be told, if you took aside only one or two of those million of plants, they probably would be ratty...but there's safety in numbers and distance. We do not have that advantage in our gardens...so get out the hedge clippers. March is a good time to do this...trim just to the bottom of last year's flower spikes to make a somewhat mounded shape. Now, was that so hard? Once a year is all it takes, and a spring pruning still lets you enjoy all that wonderful winter foliage on the colored forms.

Choosing varieties for your garden will be by personal preference. With that many to pick from, it is like roses or rhodos...grow the ones you like to look at. I can only give guidelines of the forms that are available. The flowers can be single or double on long or short spikes. I have taken full open spikes of 'Peter Sparkes' and 'H.E. Beale' and hung them to dry, and they make wonderful bouquets...unfortunately, not too durable...but so easy you can do new ones every year. Colors range from white and pale pink to bright pink, crimson, and purple. There are varieties like 'Marleen' that seem to bloom forever since the blossoms don't ever actually open, just show outer color.

The foliage on some is so spectacular that even if they didn't bloom, no one would notice. Red-gold ones like 'Firefly', 'Blazeaway', 'Boskoop', and 'Sir John Charrington' are bright all year round. Silver ones like 'Jan Dekker', 'Silver Knight', and 'Grey Carpet' will gleam against dark backgrounds. Some like 'Spring Torch' and 'Spring Cream', have colored foliage on new growth only...almost like an early bloom...and then the proper flowers come later. Very dwarf ones can be used in troughs or rockeries, as 'Foxii Nana', 'Dainty Bess', 'Humpty Dumpty' and 'J. H. Hamilton'.

The list is endless...but this should give you an idea of the lovely ones there are to choose from. Visit gardens and plant centers in summer when they are in bloom. I only wish I had more room in my garden to have an entire bank devoted to them...in drifts of all year color.

Happy planting!

Rhododendron williamsianum

Rhododendron williamsianum, introduced to horticulturists of the western world in 1908 by Ernest "Chinese" Wilson is at once one of the most recognizable and one of the most enchanting rhododendrons. Its unique combination of almost orbicular, mid-green leaves, spreading and somewhat rounded or dome-shaped habit, and disproportionately large, candy-pink, campanulate flowers make it easy to recognize and well-adapted to gardens both large and small. Its densely mounded shape often has a somewhat brooding appearance, a bit like having a very large toadstool in the garden...but its solid presence makes a good anchor to a plant grouping, and can provide an effective screen, if needed.

Although never thought of as a large rhododendron, it can in time become quite massive, spreading up and out in large billowy curves that are certainly beyond the reach of vertically-challenged gardeners.

R. williamsianum flower
Photo by Chris Klapwijk

It was a species that has so captured the imagination of rhododendron fanciers that a veritable frenzy of hybridizing ensured. After all, there were so many positive characteristics to try to attach to other rhododendrons: small, tidy, glabrous leaves, with lovely bronze new growth, well-shaped, pretty pink blossoms that were large in relation to the leaf size, and a spreading compact habit that keep the blossom down where people could easily admire them.

Looking through Salley and Greer's book Rhododendron Hybrids, I gave up counting at the end of the C's, having reached something over 55 hybrids. Each decade seemed to bring on a new wave of williamsianum crosses:

  • Rothschild in the early 30s, including the iconic hybrid 'Bow Bells'.
  • Lord Aberconway in the late 30s and early 40s, with a whole series of hybrids beginning with "A" ('Adrastia', 'Adrean', 'Amata') as if he were trying to get in first in the Yellow Pages, but also developing the wonderful 'Cowslip', a williamsianum x wardii cross.
  • Hobbie in the mid 40s, with his 'Gartendirektor(s) 'Glocker' and 'Reiger'
  • all the way up to Weldon Delp and Hans Hachman's more recent hybrids.
  • Even J. C . Williams of Caerhays Castle used this namesake rhodo in his inspired 'Hummingbird' cross with R. haematodes.

R. williamsianum is truly endemic to Sichuan, China, being found only there, and even within that province its distribution is very limited. However, it is now in constant and widespread production and cultivation all over the world.

Lepidote Rhododendrons

Rhododendron enthusiasts are often asked what they mean when they refer to a rhododendron as a "lepidote". The confusion is compounded when one sees quite a bit of space devoted to lepidotes in flower shows.

A nurseryman may tell you casually that it refers to the small-leaved evergreen rhododendron. This can be used as a generality...but not as a hard and fast rule...as there is a fair amount of overlap between lepidotes and the "large-leaved" elepidotes.

Real traits that make it a useful distinction is lepidote rhododendrons have scales on the underside of the leaf which protect the plant's stomata (leaf pores) through which oxygen, carbon dioxide, and water vapor pass. The scales evolved originally to regulate moisture, to help keep water in the cells in dry times, and help shed it in times of surfeit . This allowed plants evolving in the tropics to live in the quick-drying forest duff on the very thin soils of the tropics, or even epiphytically on rocks or tree trunks. Turn a leaf of the lepidote over and look for the tiny scales; some are big enough to see with the naked eye, but a hand lens will reveal a world of otherwise hidden detail. Elepidotes, on the other hand, are without scales to cover their stomata.

But winter brings many of the same demands as the tropics on a plant...encasing it in wet snow or desiccating it with cold dry winds, and the scales evolved to become adept at dealing with harsh winters as well. As a result, lepidote rhododendrons have adopted and spread to nearly all environments, from tropical jungles and Siberian woodlands to mountain meadows and alpine tundra. Because of this wide tolerance of soils, temperatures and exposures, they are especially useful to gardeners in the Northeast United States. Other adaptations, such as fast regrowth after predation from grazing animals, and early bloom to deal with short growing seasons in cold climates, give us a plant that is easily pruned to shape and early to give the gardener a boost after a long winter.

Most lepidotes have axillary buds...extra flower buds under the terminal flower bud or along the branch...and in bloom often smother the foliage until all you can see are the flowers. Lepidote species range from tiny creeping alpines suitable for the rock garden to tall forest and meadow plants for woodland wildflower gardens and formal borders.

Best of all, the hybrids developed by plant breeders bring hybrid vigor to the party, giving us a huge range of plants, among them some of the easiest and the hardiest rhododendrons to grow in cold climates. A commonly grown lepidote cultivar is "Rhododendron 'PJM', which was hybridized by the Mezitts, and is now grown and admired all around the gardening world.

The large-leaved fancy varieties of rhododendrons may get all the big press...but for vigor, hardiness, adaptability, easy of culture, and sheer traffic-stopping, eye-popping show of flowers in the spring...my money is on the lepidotes!

 From the Massachusetts Chapter Newsletter, September 2006.

Growing Rhododendrons From Seed

Rhododendrons and azaleas are easily grown from seed. Unless the parent plants are species from isolated areas, the resulting seedlings will exhibit much variability. Unless you are interested in hybridizing and selecting new cultivars, use of seeds as a means of propagation should thus be limited to species plants. Even then some physical differences will be evident.

Procedure:

  1. Obtain clean seeds.
  2. Prepare a sterile container at least three inches deep, with bottom drainage; size depending on how many seeds you wish to plant.
  3. Fill the container to within ½ inch of the top with a mixture of 40% perlite and 60% fine sphagnum peat moss. This mixture should be moist...but not wet.
  4. Level and firm the surface of the mix.
  5. To control fungal disease, spray the soil surface with fungicide Captan. Read and follow product instructions.
  6. Sprinkle seeds thinly on the surface...do not water again.
  7. Put plastic or glass over the container to make it moisture tight.
  8. Place in a warm dimly lit area until seeds germinate.
  9. Put under fluorescent light for 18 hours a day at 70-75°F.
  10. Anytime after true leaves have formed, harden the seedlings off by gradually opening the cover over the period of at least one week. Water carefully as needed to keep moist. Watering through drainage holes in the bottom is safest.
  11. Transplant when ½ to 1 inch tall to flats using 50% sphagnum peat and 50% perlite. Lift under the roots and handle by a leaf. Plant at same depth. Water to settle in.
  12. Water to keep moist, but not wet. Fertilize with azalea food or other acid fertilizer once a month using ½ half strength. Always water at least once between fertilizer applications. To slow growth and harden off, stop fertilizing and water less frequently.
  13. Transplant when seedlings become crowded.

Keep the growing area clean to prevent damping off, water properly, and...success is almost assured!

A Black-flowered Rhododendron

Looking for a rhododendron with black-looking flowers? Rhododendron 'Black Widow' is causing quite a stir among collectors as its very dark maroon flowers appear to be almost black. Also, to add even more interest, this interesting hybrid has white stamens which stand out against the black, wavy-edged petals. Up to 21 flowers are held in ball-shaped flower trusses. Bloom-time is typically May in North America.


Photo by Harold Greer

This unique cultivar was created by Roy Thompson of Waldport, Oregon by first crossing the dark purple, flowered rhododendron 'Frank Galsworthy' with 'Leo', which has a rich, dark-red flower. He called this hybrid 'Gal-Leo'. He then crossed this plant with the maroon-flowered rhododendron 'Warlock'. In order to increase his chances of finding a black flower, he planted out several hundred seedlings of this cross. The best one of the lot Roy named 'Black Widow'

The plant's bright green foliage is 6.5" long, elliptic in shape, ribbed and shiny on top. It has an upright and spreading growth habit, and it grows to a typical height of 3 feet in 10 years. The plant is cold hardy to at least -5°F (-21°C).

Consider having this wonderful rhododendron cultivar in your garden.

Winter Protection For Rhododendrons

If you haven't planted your rhododendrons in a protected location, you may have to consider providing them with some winter protection! Rhododendrons, particularly large-leafed forms, are sensitive to winter sun as well as winter winds, and if not protected properly, you may have serious damage or lose the plant by spring.

Damage to plants is likely to happened if the plant did not receive ample moisture before in the Fall. During the winter, drying winds and frozen ground deprives plants of their natural moisture intake. The exposed portions of the leaf...usually the central portion when the leaf was curled...may become brown. This may also appear on the edges of some leaves.

To prevent scorch, plants should be well watered in November, especially if rainfall has been sparse; protected from drying winds; mulched well, and given some shade. New plant growth may not have a sufficient amount of time to become woodsy and harden off for the winter. Also, flower buds are the least cold hardy part of the plant.

Rhododendrons, boxwood, azaleas, hollies, and laurel will benefit from an application of an anti-desiccant, such as Wilt-Pruf. Read and follow all instructions. Spraying should occur in late Fall when temperatures are near 40 degrees F. Most anti-desiccants are composed of a "waxy" substance that can break down during winter's thaws necessitating a reapplication.

If you do not get a chance to apply an anti-desiccant, you may want to provide a wind-shield, such as burlap to these shrubs as well as some mulch protection around the base of the shrub. Young plants can be enclosed with chicken wire or dog fencing, and packed loosely with oak leaves. Remove the protection in the spring as buds start expanding. Mature plants can be mulched with several inches of wood chips at the base.

Evergreen boughs can be leaned or tied against plants to limit winter injury. A teepee-like structure constructed with three or four evergreen trees or branches with their points forced into the ground and tips tied together provides adequate protection...or use a burlap covering around individual plants. Snow fencing alone or with a polyethylene plastic sheeting attached to it also gives effective wind protection. Cover the plants just before freeze up in the Fall and uncover after all the frost is out of the ground in the spring.

Weigela...a companion plant

Once the main splash of rhododendrons is over, there is a charming group of plants that fills the color gaps in our landscapes quite nicely. Named after a German botanist, Christian von Weigel, Weigelas are deciduous shrubs of open woodland areas in parts of Asia which have a multitude of foliage and flower features.

Most of our available varieties are selections or hybrids of two species: W. florida and W. praecox, although the wild forms are rarely offered. The blooms, in May and June, are tubular, in small clusters along older stems, often with nicely contrasting stamens. In blossom, they attract hummingbirds by the flock.

The "in" thing these days among plant introducers is purple leaves, starting back with 'Foiliis Purpureis' ('Java Red')...on to 'Victoria', then 'Wine and Roses' ('Alexandra'), 'Ruby Queen', and now 'Midnight Wine'! The color is getting darker, and the plant habit is getting smaller...what's next...a black groundcover Weigela? Attractive and useful plants nevertheless...most of them have pink to bright pink blooms.

The 'Dance Series', developed by Agriculture Canada, have all been selected for very compact habits, extra hardiness, and richly colored blooms. Foliage variations are from green to burgundy, with deep pink or red blooms. Look for 'Tango', 'Polka', 'Samba', 'Rumba' and 'Minuet'.

Gold-leafed forms are a bit more finicky...they need partial shade to avoid foliage burn but too much shade makes them go green so it's a fine line. 'Looymansii Aurea' has pale pink blooms, while the newer 'Briant Rubidor' (aka 'Olympiade' or 'Golden Ruby') has dark ruby flowers that offer a striking contrast. Variegated leaves, with cream to light yellow margins, occur in both species, and have pink flowers. The variegated areas take on rich pink to red tones in fall, for extra punch.

White-flowered forms are available as 'Bristol Snowflake', 'Candida', 'Mont Blanc', and others...but I must admit I don't really care for them...although 'Mont Blanc' is highly rated. Possibly I just haven't seen one at the right stage or in the right setting. A new introduction, 'Carnaval', has blooms of white and two shades of pink all at once on the same plant. That's kind of neat! For deep red, the old 'Bristol Ruby' and 'Eva Rathke', although good and reliable, have been superseded by newer, tidier, non-fading varieties like 'Red Prince', 'Lucifer', and the even smaller 'Nain Rouge'.

Weigelas grow easily in any well-drained moderate soil...and old bloomed-out stems can be cut to the ground to allow new ones to take their place. Trim right after blossoming in the early summer to keep leggy branches in order, and to give time for the wood to ripen and set bloom for next year. Some varieties will bloom off and on throughout the summer, and other appear in early summer and again in early fall.

Two unusual species, W. middendorffiana and W. maximowiczii, have light yellow flowers in late spring...most "un-weigela-like", but truthfully I have not seen either offered for sale locally. Good for you if you can fine one!

Look around in the plant centers when you've gotten all your beddings settled and your rhodos are on the wane...and you'll find one of these to be a delightful addition to your garden...big or small!

Happy Planting!

Two Lovely Ladies

Two of my favourite rhododendrons were named after two ladies - Mary Fleming and the Countess of Haddington. I have no idea what the namesakes of these varieties were like in life, but if I had to guess about them based on the plants bearing their names, then they both must have been lovely ladies, but altogether different.

I picture Mary Fleming as having been a dainty, petite lady who had a spine of steel. She must have been very pretty too. Rhododendron 'Mary Fleming' is such a good "do-er" in the garden. My own plant is in a fairly tough spot that gets full sun for most of the day and is often very dry in the summer. However, Mary Fleming grows well there and rewards me with lots of small pinky-yellow flowers every March. For me, it's one of my most reliable early bloomers and the flowers last through light frosts.

The plant is attractive throughout the year with small leaves that often take on a reddish hue in the winter. It stays fairly small - about 2' in ten years, and that's about the height of mine, but I have seen older plants reach about 5'. It's a hybrid of two lovely species, racemosum and keiski. While my plant is in the ground, Mary Fleming also makes a good potted plant due to its small stature.

The Countess of Haddington is an old variety, (1862), so presumably, was named after the real Countess of the day. It was a cross of ciliatum by dalhousiae. For those lucky enough to garden in warmer climates than mine, I suspect you can manage this one easily out of doors, but here in the Pacific Northwest, the Countess requires effort. I guess that since she's an aristocrat, she expects special treatment.

I grow my 'Countess of Haddington' in a 5 gallon pot. During the summer months she lazes around under the shade of an old apple tree where she gets some protection from the heat of the day and from full sun. I use a slow-release fertilizer treatment three times a year, and the Countess gets lots of water as the pot dries out quickly. I may have to break down and re-pot this plant this summer, but if I do, it will go into as light weight a pot as I can find because I do move the pot around frequently in winter. I occasionally pinch back some of the new shoots to keep the plant a manageable size and maintain some fullness. However, even after 6 years, the plant is a very manageable 4' tall, presumably due to its ciliatum heritage.

Since the Countess of Haddington is tender here, as soon as the temperature drops to near freezing, the plant gets moved to a sheltered area near the house where it spends much of the winter. I like to leave my tender rhodies outside as much as possible in the winter, but I pay close attention to temperature forecasts and my secret to growing them is to be ready to move pots into a frost-free area whenever necessary. The Countess of Haddington is only hardy to about 20°F, so I'm prepared to pop it and all my other tender rhodies under my enclosed deck anytime the weather forecast indicates the temperature may drop to more than just a few degrees of frost. There aren't any windows under the deck so the plants remain in the dark during cold weather. During cold weather snaps, I have left them in this location for up to three weeks at a time, but they manage just fine even though there's no light. Once the cold is past though, they get moved back outside to their sheltered spot. I take care to make sure The Countess and her friends are watered on an as needed basis throughout the winter. It is surprising how fast they can dry out, even if it's pouring rain.

As soon as I see the flower buds opening, usually mid to late February, the Countess is moved into my sunroom where I'm rewarded with large, trumpet-like flowers of very pale pink. The fragrance is also wonderful and the plant perfumes the entire house. Since the sunroom is fairly cool, the plant stays in flower for almost a month which makes my efforts worthwhile. So, while Mary Fleming is a tough plant and the Countess of Haddington is a tender aristocrat, they're both lovely ladies, and I enjoy their company.

The Cecil and Molly Smith Garden

Cecil and 'Molly' Smith were the founders and developers of what has become the internationally renowned Cecil and Molly Smith Garden. Cecil started collecting rhododendrons in the late 40s at their first home adjacent to the present-day Garden property near Newberg, OR. Cecil was a grass seed grower by trade...and originally owned much of the surrounding land. He became an early member of the American Rhododendron Society in 1947. In 1951 they obtained the garden property, finished their new house and started the garden. The area had been logged in 1915, but by 1951 had reestablished its growth of Douglas fir and native plants.

Cecil had grown up at Champoeg in the Willamette Valley and treasured the native plants. He also became interested in discovering the best genus Rhododendron had to offer. He eventually helped sponsor expeditions to the Himalayas, and participated in seed exchanges and experimented with hybridizing. His efforts were directed at what he thought were the most outstanding rhododendron characteristics: fine foliage and great flowers. A number of his crosses are found in the trade including, R. 'Noyo Brave' and R. 'Yellow Saucer'.

Cecil was very generous with his plants, sharing his cuttings, seeds, and pollen. He wrote articles for The Bulletin of American Rhododendron Society and his photos were used extensively.

Rhododendrons are the Garden's featured plants! Cecil was among the first to grow R. yakushimanum and used it for hybridizing. He was a "leaf turner" and loved the fine indumentum of R. yakushimanum and R. bureavii. He combined these two species and produced R. 'Cinnamon Bear'...the signature plant in the Garden.

The woodland Garden encompasses about three acres sloping gently to the North. Cecil took advantage of the slope and constructed paths that weave from top to bottom of the property. Decaying logs, tree stumps, and fallen limbs have been retained for their natural beauty. This accumulation of 'duff' provides most of the nutrients required and minimal fertilization is required. The Garden is weeded...because Cecil noted: "Unless a woodland garden is weeded, it is not a garden, but a wild area."

Molly's favorites were the Rhododendron 'Loderi' planted near the house and now are over 20 feet tall. Although never taking much credit for the Garden, Molly Smith contributed upkeep and maintenance in the Garden through the years. When the Smiths lived at the Garden, they freely shared their garden with others and hosted many garden tours. No one interested in rhododendrons was denied a visit in the Garden.

Cecil and Molly each received American Rhododendron Society Bronze Medals from the Portland Chapter, the highest award. Molly humorously commented that no one had ever before received a Bronze Medal for baking cookies! Molly was always the gracious hostess, welcoming her guests to her home and garden with freshly baked cookies. In 1967 Cecil was awarded the Gold Medal and in 1985 the Pioneer Achievement Award from the American Rhododendron Society.

In 1983, after more than thirty years of devoted stewardship, Cecil and Molly Smith reached a point in their lives where they could no longer care for the Garden. The Portland Chapter purchased the Garden when the Smiths made it possible by selling their land to the ARS at half of its appraised value. The Portland Chapter, along with the help of Willamette and Tualatin Chapters assumed its care and management. Cecil died in 1998, and Molly in 2007.

The Smith Garden has charmed and delighted visitors from around the world. Edmund Rothschild and his wife have visited the Garden many times along with other well-known Rhododendron enthusiasts. David Leach, author of Rhododendrons of the World, was a good friend of Cecil's, and enjoyed spending time in the wooded setting. Smith Garden has been featured in Horticulture magazine, and in the PBS television show Victory Garden. It is also included in The American Man's Garden by Rosemary Verey. Locally, every national convention of the American Rhododendron Society and Western Regional conventions held in the Portland area included tours of the Smith Garden. Mike Darcy has highlighted the Garden on his television show. Local newspapers and other publications have also included articles and photos of the Garden.

The native Douglas firs create an ideal environment for a natural woodland garden of rare beauty, featuring superior forms of species and hybrid rhododendrons. Complimenting the rhododendron collection are choice trees, shrubs, wildflowers and bulbs. Each pathway reveals its own visual treat...a moss-covered log with plants tucked in the bark crevices, plants thriving on tree stumps, drifts of wild flowers. Cyclamen, Narcissus, Erythronium and Trillium flourish here. The day-to-day work is done by a small group of volunteers with Fall and Spring work parties of the American Rhododendron Society chapters' members and friends.

Designing a Rhododendron Garden

For a rhododendron and azalea garden, plan the empty space first. With annuals or low-growing perennials, one's consideration is with the flower bed...but when plants grow tall...such as rhododendrons...it is much better to plan the open area because tall plants will make walls in your garden.

The open spaces will become "garden rooms". Consider traffic flow from one room to another...either by wide connections or with winding paths. Once you have defined the open areas, you are free to plant everything else...as flower beds! Consider how to treat the various spaces defined in the landscape. Should there be "open spaces" to enhance vistas, "corridors" for transitions between area, "closed spaces" for privacy, or "extensions" of the home interior? Consider movement between areas and access routes.

Design for easy care, avoiding plans that require heavy maintenance or constant pruning. Wide paths are better than narrow walks...since the latter often become tunnels over time. If the soil is poorly drained or plants won't grow easily, choose an alternative...such as mulched areas or slate.

Consider costs, too!

There are basic principles in designing. They are:

Form and Mass. The mature landscape should be in scale with its surroundings. Plants give the garden form, so mass plantings will be more effective than mixed groupings as gardens age. A planting of 5 to 10 azaleas of the same variety will look much better than a mixed planting as the garden matures since the plants will have grown together to look like one large specimen plant.

Line. Graceful and irregular curves are more interesting than straight line and sharp angles.

Color and Harmony. Choose colors and varying leave textures that go well together. Color schemes should be harmonious and compliment each other and any existing architecture.

Emphasis and Contrast. Place light colors again dark ones for emphasis. Include plenty of white and neutral colors to blend or provide transitions. For gardens with brilliant shrubs like azaleas and rhododendrons, it is wise to allow for at least 50% of the plants to be white or other soft tones to allow the eye to have a visual retreat from the more intense colors. In addition to white, pale pinks and yellows...such as those in some of the Knap Hill azaleas like 'Marina' are good blending colors.

Balance and Repetition. Informal, asymmetrical balance is preferred to symmetry since formal designs with shrubs become a liability over time. A large planting on one side of the yard can be balanced with a small but similar grouping on the other. Repeat colors and forms.

Unity. Everything should go together. The garden should enhance the home architecture and the community. Simplicity is desirous...but often difficult to achieve for a plant collector.
• Choose varieties that will grow in scale appropriate for the landscape needs. Some azaleas and rhododendrons can be used as ground covers while others will be trees. Use dwarf varieties in the foreground or constrained places. Use large growers in the background or for screens.
• Consider time of bloom. Some varieties flower very early and may need frost protection while others bloom late and might require more shade to extend bloom time.
• Change the color scheme by selecting plants that bloom at different seasons.
• Use many companion plants.

Fragrant Rhododendron fortunei

Plant hunter Robert Fortune discovered this lovely species in 1855. It is a fragrant rhododendron...but unlike those sweetly scented, tender beauties lindleyi, nuttallii and maddenii, R. fortunei is quite hardy.

Fortune's original collections were made in Chekiang Province, in eastern China, at about 3,000 feet. Other plant hunters later found the species in Anhwei, Kiangsi, and Hunan Provinces growing in woods and forests at 2,000-4,000 feet in elevation. Plant hunter Robert Wilson noted that the species was common on other Chekiang mountains, particularly in the Lu Shan range of the neighboring province of Kiangsi, to the west.

The leaves of R. fortunei are handsome, and show some variation. They are 3 to 7 inches long, 1.5 to 3 inches wide. A prominent and very attractive feature is the deep red of the midrib and petioles (leaf stems); these create a ring of color around the dormant bud that seems to deepen and become more conspicuous in winter. The leaves of the Lu Shan form are typically a dull, olive green in color, and have rich red petioles.

The flowers of R. fortunei are borne in a loose truss of 5 to 12, and are shaped like wide bells...funnel-campanulate. They are pink to pale pinkish-lilac or rose and are fragrant.

R. fortunei flower
Photo by Boris Bauer

R. fortunei has been much used for hybridizing, particularly in North America, and especially in the East...where it is appreciated for its tolerance of summer heat and winter cold. The two great hybridizers, Rothschild and Dexter, made free use of it this rhododendron as a parent. Indeed, one of the most loved hybrids of all time in eastern North America is Dexter's 'Scintillation'.

It is noteworthy that a particularly fine large flowered, sweet-scented R. fortunei clone was used as the seed parent of the original 'Loderi' hybrid grex. The other parent is R. griffithianum; a tender rhododendron found growing in the lower elevations of the Himalayas.

Adapted from Whidbey Island ARS Chapter newsletter, May 2003

Visit Garrett Park, MD

Garrett Park, Maryland, located 12 miles north of Washington, D.C., is a small town (0.3 square miles of land, with a population of 992) famous for its Victoria houses, trees, and shrubs. The entire town is designated an arboretum, boasting more than 700 species of shrubs and trees, including a host of azaleas and rhododendrons.

Named for Robert W. Garrett, president of the Baltimore and Ohio Railroad, Garrett Park was laid out in 1887 along the lines of an English village. Much of the town is located in the Garrett Park Historic District, which is listed in the National Register of Historic Places.

In 1898 the town enacted legislation to preserve its sylvan setting by protecting its trees and shrubs. In 1977 Garrett Park officially declared the whole town to be an arboretum. Since then the Arboretum Committee has planted hundreds of trees and shrubs, including many rare and usual varieties, to maintain a canopy of shade and to provide color and botanical interest throughout all seasons of the year.

Phil Normandy, an arborist and member of the ARS Mason-Dixon Chapter, works part-time as Garrett Park's tree expert and cares for the 400 trees in the town's public space. Referring to the majestic sugar maples that were planted shortly after the town was founded, Mr. Normandy says, "Trees get better with age and some of these are essentially antiques."

Garrett Park MD home
Photo by Al Teich

Garrett Park is well worth a visit, especially in spring when the town's streets are a wonderland of color. Most home owners are avid gardeners and their landscapes are beautifully designed and well-maintained. If you love rhododendrons and azaleas this town certainly has many fine specimens. Put Garrett Park on your list of places to visit!

Oh dear, oh deer!

Like many American Rhododendron Society members, I share my garden with various "critters", including deer. Fortunately, the local deer don't like most rhododendrons, although they do like azaleas and evergreen azaleas, in particular, are akin to deer candy. I'm not able to fence the front yard (local by-lines and all that), so I've basically surrendered my front garden to the deer. As time has gone on, I've gradually switched many companion plants to things the deer don't seem to like. So, instead of Hostas, I now plant Brunnera - a lovely foliage plant with small blue flowers; the only tulips in the front are now in a pot on the porch, but I can plant snowdrops and daffodils. So, far, the deer have left the Crocus alone, so each fall, I add more of these. As well, for fall bulb colour, I find the deer haven't yet eaten Nerine or Schizostylus, but since these tend to be a bit pricey here, I've only planted a few of each so far, and I'm watching to see whether or not Bambi and his pals will eat them. Time will tell if these will work for me. Ferns seem to be generally deer resistant as do hellebores of all types. Hellebores make great companion plants for rhododendrons, having the added bonus of starting to bloom around mid-January in our area, with many new varieties having attractive foliage. The deer don't like anything with highly aromatic foliage, so in the sunniest areas, I've planted lots of lavender and I could put in some rosemary too. These may not be what generally come to mind as good companion plants for rhododendrons, but they seem to get along fairly well in my garden.

Deer on city street

I've seen a couple of techniques that other local gardeners use to encourage the deer to move along. Two of my neighbours use motion activated sprinklers that are placed near their most precious hydrangeas (deer just love hydrangeas!). These seem to work well here, and I'm told that just the noise of the sprinklers starting is enough to get them to move. Other neighbours enclose small trees and shrubs with flexible plastic fencing material as a temporary barrier. And, some of the locals use various deer repellants (Bombax is very popular here). They spray their plants regularly in the spring to train the deer to keep moving by their property in search of something less stinky. Sporadic spraying is needed as a gentle reminder that the plants smell bad.

A great idea I saw recently was to put down wooden pallets on pathways leading from an unprotected garden area to the protected area. In this case, the plants in the back garden were much loved by the deer, but they could only access the area by going along a narrow pathway beside the house. The pallets act like a cattle guard and the deer just don't want to walk across the wooden slats. The gardener in question did say that the wooden pallets get very slippery when wet, but he can just up-end them while he is working, then pop them back on the ground as deer deterrents. Of course, the best deterrent of all is a good fence. Local recommendations say fences should be at least 8 ft high. However, most of us are able to keep the deer out with a standard 6 ft fence as long as shrubs are planted in beds beside the fence line. The theory is that deer need to be able to see an open space where they can land safely upon completing their jump. This certainly seems to work in our area: those of us with dense shrub plantings in a wide bed near our fences haven't had any problems with back yard gardens, but the neighbours with lots of lawns see the deer regularly.

It seems deer will eat anything if they get hungry enough, the trick is to make your garden less inviting than your neighbours. So, since deer don't like rhododendrons, you might as well plant lots! As if any ARS member needed an excuse to plant more rhodies!

Gardens East and West

Although my first job was with the rubber plantation industry in the then Federation of Malaya (now West Malaysia), I lived in houses provided by my employer, and had not yet become interested in gardening, and I now regret the opportunities I missed. However, I did fall in love with the people, culture and climate of SE Asia. After 8 years there, politics and personal reasons made it necessary to leave and return to the UK.

I went to Edinburgh, and the first garden of my own belonged to a ground floor flat (apartment) in a moderately salubrious part of the south of the city, only a five-minute car ride from the genetics laboratories where I was working for a Ph.D. The flat had a small garden area outside the front windows, only about 70 square feet, with a manhole cover over a drain access in the middle. Here was my introduction to gardening, a love that has grown over the last 35 years to become a consuming passion. I began (doesn’t everyone with no gardening background) with annuals - quick returns in color and scent. These rapidly lost their attraction, and, in view of my limited space, I turned to alpines. I even made a garden in a cement bowl, to put on top of the manhole cover! I think my rock garden must have been one of the smallest ever, and my enthusiasm for acquiring new plants rapidly outgrew the space available. I can remember working round the garden by torchlight (like most postgraduate students, I was working all the hours there were in the lab) trying to plant something without digging something else up. Also, despite the poor soil and vicious climate, plants persisted in outgrowing their allotted space. Something would have to be done. Fortunately, this episode coincided with the completion of my Ph.D. and submission of the thesis. I could now look for a job.

The Medical Research Council (MRC) offered me a post as a research scientist in its Clinical and Population Cytogenetics Unit (now called the Human Genetics Unit) based in the Western General Hospital in Edinburgh. On the strength of the offer, I started to look for a house with a proper garden. This I found about 7 miles south of Edinburgh, in a village called Eskbank. The fact that the MRC unit was on the north side of the city, requiring a commute across the city twice a day, seemed less important than that the house had a garden of nearly an acre, which had been almost totally neglected for about 3 years. The garden was entirely surrounded by a high stone wall, and I immediately had visions of all the exotic trees and shrubs I could grow in that sheltered space. There was also a conservatory on the north side of the house, and a lean-to greenhouse on the south-facing wall of the garden. The climate in that part of the east of Scotland is cold and dry. Frosts can occur in 10 months of the year (only July and August are reliably frost-free) and it has been known to snow in mid-June! Rainfall is low, only 25 or so inches per year, falling mostly in the winter months, and there are frequent cold winds. Temperatures in the worst years, like 1981-82, can go down to -17°C (0°F).

Tall privet hedges (so high they had to be cut from a stepladder) divided the garden internally into three areas. The front garden, to the west of the house, had two broad areas of lawn on either side of the gravel drive, with a broad bed down the north wall. Then there were the "side garden", to the north, and the "orchard" separated from the rest by a concrete path, on the south of which was one of the hedges, with another tall wall on the north. The side garden had a small lawn, but much of the space was occupied by a raised area (perhaps intended for a pool), on top of which 2' X 2' concrete slabs had been laid, alternating with open squares of earth, to make a chess board. Hybrid tea roses had been planted in the open squares, adding further to the Alice in Wonderland effect, though most of the roses had died. The remainder of the garden was largely choked with scrubby Michaelmas daisies (I really don't like most composites). When these were cleared, it revealed a vast quantity of snowdrop and Chionodoxa bulbs, so many they had been pushed out to lie on top of the soil, which augured well for the success of other bulb species.

The raised area was the first to be tackled. Rather than try to remove this structure, I took away the concrete slabs, added quantities of gravel and turned it into a raised bed, to form the center of a rock garden, building up screes and cliffs around the perimeter. I thought that alpines would do well in the local climate. I started with the commoner sorts - Aubrieta and so on, but rapidly became enthused by dwarf bulbs and corms - Narcissus, Tulip, Crocus, Cyclamen, Iris and Galanthus. I also grew a lot of gentians, and primulas, both alpine species on the rock garden, and the beautiful Barnhaven polyanthuses for the ordinary garden beds. Right at the top of the rock garden, against the wall, several species of Juno iris (I. magnifica, orchioides, bucharica) survived for several years, but never increased.

By this time I had been introduced to the Scottish Rock Garden Club (SRGC), whose members were generous both with plants and advice. I am especially grateful to the late Dr Simson Hall, who was not only a keen rock gardener, but also passionate about all flowering shrubs and bulbs, and in particular rhododendrons. It was he who introduced me to the late Euan Cox, founder of the rhododendron specialist nursery Glendoick Gardens, and in turn Euan was happy to take me on guided walks round his beautiful woodland garden outside Perth. My rhodoholicism started with the dwarf species and hybrids grown in and around the base of the rock garden and neighboring areas. These began with the Lapponicums, like R. russatum, scintillans, microleucum, chryseum and hybrids, 'Blue Diamond' and so on, which I was sure would be hardy in the east of Scotland. But I soon (as do we all) began trying to push the limits of what I could grow, so added species like the beautiful R. moupinense (always one of my favorites in all its color forms, white, apple blossom pink-and-white and rose pink) and hybrids like 'Cilpinense', as well as its other parent R. ciliatum, plus the gorgeous R. yakushimanum. You will notice, I am still using the older names - I don't have the energy or mental agility to learn a whole new set! Many rhododendrons, like R. leucaspis and its hybrids, though perfectly hardy in themselves, flowered so early that their flowers were destroyed by frost almost every year.

I planted a whole lot of dwarf conifers, and the ease of these and the dwarf rhododendrons made me consider a suitable plan for the remaining section of the garden - the so-called orchard. This was an area of about a quarter acre containing a few old and diseased apple trees in rough grass, with a row of large lime trees (Tilia europea) down the west border, backed by a brick wall. With the help of Joe Sharp, an ex-coal miner (most of the mines in the district had closed) I cleared the apple trees, trimmed the grass, and erected a chain-link fence across the eastern third of the area. This included a lean-to greenhouse against the south-west-facing wall), and I intended to use this part for fruit and vegetables. The remainder would be a tree, shrub and bulb garden. I had already learnt that herbaceous plants take a deal of care, for which I could not spare the time. I made an exception though for hellebores, as their rich and somber flowers are so rewarding in the depths of winter, and last for weeks. Reading Jan de Graaf's books had fired an enthusiasm for lilies, and I was growing many of these, as well as rhododendrons and other plants from seed. Much of the seed came from the various seed exchange schemes - Alpine Garden Society, SRGC, ARS and so on, but I had also collected berries of many Sorbus species from the arboretum at Westonbirt while on a fall holiday. These were very successful, and fruited early and regularly, as well as providing fine fall color.

My rhododendron collection had already expanded to include all the Cinnabarinum and Triflorum species and hybrids I could find (I believed these would be best suited to the climate, and I love the Cinnabarinum flowers and foliage), as well as several clones of R. edgeworthii (the only reliably hardy Maddenia). I even tried some of the large-leafed species like R.fictolacteum, but they were never happy, even when I could give them a shady position. Just too dry for them. However, a number of Thomsonii species did well in the shade of the lime trees. These included the lovely bowl-shaped R. soulei and R. callimorphum and the yellow R. wardii in several forms. In the open areas I planted all the sweet-scented deciduous azaleas I could get - R. prinophyllum, R. nudiflorum, R. viscosum, R. luteum and R. atlanticum, and as many clones of R. occidentale as I could find.

Then Graham Stuart Thomas's books on shrub roses started me on another collection (especially of the yellow species and near-species like 'Canary Bird', R. ecae, R. X cantabrigiensis and so on), and I got keen on willows, and Camellias and Rubus and tree and herbaceous peonies and honeysuckles, and, and...You know how it happens. Anyway, after about 5 years the garden was getting pretty full. The walls were almost completely covered, with a Mermaid rose having the north-facing wall to itself -the thorns were too vicious to try any pruning: once inside their clasp and you would never escape! The fruit and vegetable section was also well stocked by now - a peach and a nectarine in the greenhouse, and espaliered apples, plums and pears along the wall, strawberries and raspberries (very successful in Scotland) as well as gooseberries and blackcurrants, and even some exotic varieties of potato.

The conservatory on the north side of the house proved ideal for seed raising, but had insufficient light and ventilation for my alpines and bulbs. I built an alpine house (using the concrete slabs taken from the rock garden as footing) in the side garden. This had the great advantage that I could be dry while caring for my plants, and the summer dormant bulbs could be left to bake in comfort if I had to go away. Two hot dry summers, and correspondence with the Aril Group of the American Iris Society (by snail mail - this was before the days of email for everyone) encouraged me to try some of the desert irises of the Oncocyclus group. I built two raised frames (stealing ground from the vegetable patch) and got plants from Israel. The flowers were spectacular, huge things in reds, purples, browns and silvers, with a few pinks and yellows, and they did wonderfully well for a couple of years, but then the weather pattern reverted to its normal showery dull cool summers, and they gradually rotted away. A few of the Regelio-Cyclus hybrids survived for another 9 or 10 years, but never flowered at all freely and when I moved house into town, I gave them to friends in the south of England, who I hope have had better luck with them.

The bitter winters of 1981-82 and the following year, which felt as if we were entering a new ice age, and killed many of my more tender plants, made me realize the problems of commuting in snow and ice. This, plus the cost of heating a big Victorian house, caused me to seriously consider the possibility of moving into town, and I finally surrendered two years later.

The next garden was a reversion to an ordinary suburban plot, though with more space than my very first garden. I moved in a snowy January, with the ground hard frozen. Despite this, I tried to move some of my hellebores and the smaller rhododendrons, and even hunted for the more precious bulbs, though the earth had to be broken with a pickax! I managed to salvage some of the better things, and they sat in the garage until the earth thawed sufficiently to let me plant them. It took a couple of years for me to adjust to the small space, and I still kept bringing home shrub roses that outgrew their space in a season! Eventually I was back to dwarf rhododendrons and bulbs, with my surviving hellebores in among them. One of the most successful rhododendrons was 'Dora Amatais', which flowered regularly every spring, with flowers that withstood several degrees of frost.

This was the period when I started visiting gardens seriously, as my own took less time to care for. There are many gardens in Scotland and England, both privately and publicly owned, open either year round or on specific occasions, and nearly all are worth a visit. I took holidays in the west of Scotland, in Argyll and Sutherland, visiting places like Glenarn, Arduaine, Gigha and Benmore (an outpost of the Edinburgh Royal Botanic Gardens, RBGE), and later started going to Ireland, particularly the southwest, Cork and Kerry. Here the summer climate was perfect, the landscape idyllic, and the gardens spectacular, and I resolved to look for a house with some land for my retirement. I was encouraged by visiting gardens like Ilnacullin (Garinish) in Glengarriff harbor on Bantry Bay, where the Maddenia rhododendrons scent the whole island in May and June. Fota, near Cork City has a fine arboretum full of tender trees, and Dereen, on the Kenmare river, north of the mountains between Cork and Kerry, has tree ferns better than I have seen them anywhere since the Cameron Highlands in Malaya!

I moved to my 200-year-old farmhouse, with 3 acres of rough bog and grassland 50 miles west of Cork city, in June, towing a trailer full of plants in pots and plastic bags. It was raining when I arrived, and the wind was a cold north-eastern. It barely stopped raining and blowing for the remainder of the year. I managed to get some clearing and planting done round the house, but the bog-land behind the house, with a stream running through it, which I had planned to drain and plant with trees, opening the stream into a pool, remained too wet for any machinery to get in there. The gales steadily increased in frequency and violence, and at Christmas so many trees and power lines were brought down that I was without electricity for 5 days. Fortunately I had a gas cooker, but for water I had depended on an electric pump from my 100 ft well. My neighbors to the west were farmers, with a generator for their pump and milking parlor (this is a dairy-farming district) and supplied me with water by the bucket, as well as inviting me to share their Christmas meal. Good people.

The following spring continued the same pattern of weather, and, having come here to escape the cold of Edinburgh, I felt I had wasted my time. I decided to cut my losses and head back to SE Asia, where I knew I would be warm. Malaysia has changed a great deal in the 30 years since I left, and I knew something of Thailand, so decided to try there instead. That was more than 3 years ago, and I am still here, and still content.

The climate here in Phuket, while similar to that of Malaya (a further 500 miles south) is very different from that of central and northern Thailand, as well as from Europe, and some westerners (farang as they are called here) find it unbearable. It is hot, and, for much of the year, humid. Daily temperatures range from a minimum of 20°C (68°F) in the cooler season (January) or 25°C (77°F) the rest of the year to a maximum of 35°C (95°F), or, on one or two days last month, 37°C. For comfortable sleep you need air-conditioning, but we don't find we need it during the day, unless we have visitors.

We get rain all year round, with peaks in the monsoons in May-June and September-October. During the monsoon seasons we get occasional days when it rains all day, but most of the time even then we get heavy rain showers (sometimes with thunder and lightning) interspersed with warm, sunny periods. Outside the rainy season we get a heavy rain shower once or twice a week - enough to keep everything growing well. Even when it rains, it is never cold! The annual average rainfall is about 90 inches, and we get around 8 hours sunshine a day from November to May, falling to 4-5 hours a day in the rainy season. Further north they have a different climate, with distinct wet and dry seasons. They only get half as much rain as we do, but it all falls between May and October. In the wet season they have floods, and in the dry season the hills burn, lit by sparks from burning rice stubble, carelessly thrown cigarette stubs, charcoal burners' fires, picnickers or even deliberately set, to clear forest for planting. In the wet, it is hotter than here, with temperatures sometimes passing 40°C (104°F), while in the dry it can be cooler than here. In the high mountains of the north, temperatures at night in January can occasionally go down to near 0°C, and frosts are not uncommon. However, the general run of night time temperatures on top of Doi Inthanon (Thailand’s highest peak at 2565 meters, 8000+ feet) don’t go much below 7 or 8°C (46-48°F) though that feels very cold after living in the south!. Daytime temperatures in January run up to 20-30°C (68-86°F) and in July go very much higher.

The soil here is abominable - sticky clay on top of broken laterite rock. Phuket was a major tin mining area, and most of the housing developments are built on the spoil from the mines, with the dredge pools converted into ornamental lakes and water reservoirs. Despite this, it probably won't surprise you to learn that any plants that tolerate our climate and soil grow VERY FAST. I have grown coral trees (Erythrina) from seed sown in January 1999 that are already 20 feet high, with a canopy as much across. Peacock bushes (Caesalpinia) also from seed sown at the same time, have to be cut back every 3 or 4 months and this only stops them flowering for a matter of a week or so. Fiddlewood trees (Cytheraxylon) from 12-inch cuttings are now 12-15 feet tall and covered with tassels of sweet-scented white flowers, loved by sunbirds (the Old World version of humming birds) and huge birdwing butterflies. I could extend the list, but you get the idea.

The ideal rhododendrons for this climate are, of course, the Vireyas, but there is not a single nursery in Thailand that supplies them. Mind you, that is not such a surprise, because the general run of nursery stock is limited to the standards - Bougainvillea, Canna, Allamanda, Hibiscus and assorted palms. The one garden in Thailand that grows Vireyas in quantity is the royal arboretum at Mae Fah Luang, right up on the northern border with Burma. Their plants (some 20,000) were all imported from Australia, but they tell me they do have plans to propagate for sale in a year or two. My plants have also all been imported, from nurseries in Australia, Oregon and Hawaii. I am very grateful to those who have been willing to take on the hassle of dealing with Agriculture Departments (described by one nurseryman as "Gestapo") to get phytosanitary certificates for export, in return for small orders.

I am pleased to say that nearly all of them have survived the trauma of the journey and are alive and growing well. They are all in pots, and I have to consider what to do when they outgrow their containers. The best plan will probably be that used by Mae Fah Luang, where they plant them in shallow saucers, spreading the roots out, and covering with a mulch of pine needles. Here we might have to substitute Casuarina leaves for pine needles, as there are no local pine trees. In the pots they grow in a mix of coconut fiber chunks with perlite, pumice and broken brick - very free drainage! I have also tried a few of the Thai native species, which all grow on the northern mountains, at upwards of 1400 meters. Some have survived and are growing, like R. arboreum, R. lyi, R. simsii and R. surasianum, but others are looking unhappy (R. moulmainense), and some (R. pachypodum) and non-natives (R. nuttallii) have already died. They survived, and even opened new leaves, until the heavy rains started in May, when the leaves started to brown and fall, so it seems to be the humidity that they don't like, not the heat.

However, I now have some 40 Vireya hybrids and species, all growing well and apparently healthy, apart from the depredations of a particularly nasty beetle, about 1-1½ inches long, yellow and gray, which loves to chew holes in newly emerging leaves. There is also a rather unpleasant caterpillar, only ½ inch long, that sticks the leaves together while they are in bud, and lives happily inside, eating away, until the outer leaves open, and reveal a mess of dying leaves inside, and a dead terminal bud. If terminal buds are going to get removed to encourage branching, I prefer to do it my way! I don't really bother much about ordinary caterpillars; they don't do a lot of damage, and they are going to turn into the lovely butterflies and moths that decorate the garden. Some of the caterpillars are quite spectacular in their own right; those of the Atlas moth (a huge cinnamon, pink and silver beast, with a wingspan of more than 8 inches) are about 6 inches long, and a glistening silvery-white. They feed on the leaves of the torch gingers, Etlingera, which always have more leaf than flower!

Other plants that have proved successful are all the Bauhinias I have tried: B. purpurea, B. variegata (in several color forms) B. acuminata, and B tomentosa (only the plain yellow one so far, but I hope to get the two-colored one eventually). My favorite so far is a form of B. variegata of which I collected seed near Mae Sai, on the northern border with Burma. It has pure white flowers with a pink flare on one petal, very strongly and sweetly scented. One of the many attractions of the Bauhinias is that they flower within a year from seed.

I also grow about half a dozen different jasmines. I love all scented plants, and the jasmines are among the best. I am still looking for seed of Jasminum revolutum (humile), the shrubby yellow scented species. I have a lot of climbers (including some of the jasmines) and one of the best is Odontadenia which has long creamy yellow buds, opening to 6-inch trumpets, apricot in the lobes and peach-orange in the center, with a beautiful scent.

Several Passiflora species also do well, and Quisqualis (Rangoon Creeper), with flowers that open white and change to red, needs to be kept in check. Scented shrubs include several Gardenias, Murraya paniculata (Orange Jasmine, Chinese Box) and Wrightia religiosa, as well as a lovely small tree, Millingtonia hortensis with the dull name of Indian Cork Tree. This really ought to be called a tree jasmine, as it has 3-4 inch long tubular creamy white flowers, with a delicious scent.

Pests other than those I have mentioned are fairly few, though fungus diseases are always a risk in the high humidity. There is a rust that attacks the frangipanis (Plumeria) but doesn't seem to bother anything else, and a pink and white fungus that grows on the stems of Hibiscus mutabilis, as well as some that cause leaf-spotting on several species (Phytophthera?). There are other pests that bother people of course - mosquitoes (only at night out of doors) and the odd snake. We had a 5-foot cobra in the garden yesterday morning. The dogs had cornered it and were barking their heads off, and the poor beast could not get out through the dog-proof wire netting. A pity, as we had to kill it (it made a meal for some neighboring gardeners), and I prefer to live and let live. Snakes don't bother you if you don't bother them, and it was only its inability to escape that made it a danger. So all in all, Phuket is a very satisfactory place to garden, though I would like to be able to grow some of the more temperate rhododendrons, and the deciduous azaleas. Still we always hanker after something we can't grow, otherwise we would be moribund, if not dead!

Three Little Reds

Many of us are downsizing our gardens and growing smaller Rhododendrons allow us to indulge our passion for our favourite genus. There are lots of small rhodies to choose from, but if you’re looking for good reds, then three small reds come to mind that fit the bill of small plants with good foliage.

If you’re interested in species, then R. forrestii ssp forrestii 'Repens' is a lovely plant to grow. It really is a ground cover, not growing over about 18 inches in height, if that. I've been growing this species as a "companion plant" in a couple of large containers. While I've had the plants for 5 or 6 years, my R. forrestii hasn't bloomed much (I think it is a shy bloomer anyway), but I don't really care. The occasional red flowers are handsome and I enjoy seeing them, but it's the foliage I like as the plants have good, shiny green leaves that make a lovely, well-behaved ground cover in my large pots. I have the 'Repens' form, but there are a number of selected forms available.

R. forrestii ssp forrestii is one of the parents of both 'Baden Baden' and 'Carmen', two nice small hybrids, both of which have been around for many years. 'Baden Baden' is a Hobbie hybrid ('Essex Scarlet' x R. forrestii), and 'Carmen' is a Rothschild hybrid of R. sanguineum ssp didymum x R. forrestii.

'Baden Baden' has bright red flowers, about 2 inches across, with a slightly darker eye. Flowers are borne in clusters of 3 to 5. When in bloom, the flowers make a nice contrast with the emerald green foliage. It's fully hardy here in the Pacific Northwest where it blooms in mid to late April. Plant height is 2 to 3 feet after 10 years, so it's a good choice for either a small garden or to grow as a container plant.

'Carmen' has deeper red flowers, more maroon red than scarlet. It is considered a true dwarf hybrid, reaching just 18 to 24 inches after 10 years. The leaves are rounded and the plant forms a nice mounded growing habit. I've been growing 'Carmen' in a container plant for a few years now, and it blooms reliably for me in late April to early May. It's a great plant to enter in flower shows because people just fall in love with it when it's in bloom. The flowers are small and bell-shaped.

All three of these plants are reasonably easy to find and easy to grow, both in conventional shrub borders or in containers, so, if you're looking for small, red-flowered rhododendrons, consider growing these three - they're all good 'do-ers'.

Bill Stipe - A Lifetime of Creativity

There are some who are content to merely live life as it is. To glide through endlessly, simply being. But for others there is an innate drive to create, to build, and to construct. Of those, there are some we revere as great artists, Picasso and Rembrandt, who spend their life in fame for their great works. And there are those who quietly hold the task of keeping the world moving forward, one silent but significant project at a time.

Wilbert Stipe, or "Bill" as he assures me I may call him, is the perfect example of an innovator. From his first horticultural experiments on his parent's farm to his increasing talent as a nurseryman and hybridizer, his life has been a constant source of creativity and exploration.

Growing up on a wheat farm, Stipe had ample time to experience both the practical and mysterious side of the plant world. "A lot of the time I was the truck driver" he tells me, "...and I would notice that every once in a while there was a stalk of wheat that was about this much higher than all the rest of them...So I started collecting those. And when I grew those, they all grew tall." Stipe's first experience with genetics was later to turn into an avid interest and skill for hybridizing, but his initial experiments weren't extremely successful. "We had some fruit trees, so I learned about grafting them...I even tried grafting prunes on apples," he tells me with a laugh"...and that didn't work." Around this same time, his father gave Stipe a small plot of land to grow whatever he liked on. "I'm the thirteenth child in the family and there was always four or five sisters at home, and they all had their own gardens and I had my own garden, and I started growing vegetables. My dad always encouraged me and gave me a piece of land...and I lived there."

Stipe continued living on the farm after his marriage to his wife Mary at the age of nineteen. After five years however, his keen mind led him to a new frontier of exploration; electronics. "Television hadn't come to Eastern Washington yet," he begins, "and I was one of the first in the area who knew anything [about TV]... I probably had the first television there." After building his own business, Stipe TV, from the ground up, he found that running any enterprise in the farming community was far from easy. "Famers want to pay their bills once a year - after the harvest - and if the harvest is bad you don't get paid at all. There's still some farmers over there that owe me money," he jokes.

Stipe's love of electronics and enterprising spirit led him to receive an excellent offer of employment from Boeing, at that time a burgeoning company in need of many electronic technicians. While working there, Stipe also attended the University of Washington, which eventually steered him into the field of electrical engineering. After a few years employed at Boeing, Stipe and his family were relocated to Fort Walton Beach, Florida. There he spent time on an Air Force base testing missiles.

While his day job centered mostly on technological innovation, the world of horticulture was never far from Stipe's mind. "While I was there [Florida], I rented a place and started planting things. I got some books and learned about bananas, and what to fertilize and what not. My postman came by one day and said, "That's the first time I've seen a banana tree in Fort Walton Beach!" I even put one in a pot and brought it home [to Washington]", but it didn't live here."

From Florida, Stipe spend time in the military, and then moved back to Washington, this time to the west. It was there, in the heart of rhododendron country, his fascination with the brilliant blooms began. "I'd never seen rhododendrons in Eastern Washington; they don't grow there. It's too cold and too hot. So when I moved to Seattle, I saw all these rhododendrons growing about and I had to learn something about it, so I joined the Rhododendron Society and the next thing you know, I was planting rhododendrons everywhere."

Mentored by big names in the field, Stipe soon became involved in much more than plant growing and society meetings. In fact, under the encouragement and direction of Warren Berg, he found himself nearly ten thousand miles around the world, hiking and seed collecting through treacherous terrain in the mountainous regions of China. "We went into places where there wasn't any road..." Stipe tells me, his description a far cry from the comfort of his beautifully crafted Whidbey Island home. "We would go hike another five or ten miles, sometimes up in really rugged territory...we even had to go up on a glacier." The team was comprised of international hybridizers, some local guides, and a few army men carrying rifles with bayonets attached. "I don't know if they were trying to protect us, or protect the Chinese," Stipe jests.

For a trip of thirty days, each man carried only a pack containing basic supplies like a compass, iodine for water purification, and bags to collect plant samples. While Stipe recalled that one friend, Peter Cox, carried a little foldable microscope, he himself chose something a little more creative. "Before I left, I went to my doctor to have a physical...And I said, "Doc, what should I take along as survival food in case I need it?" And he says, "Take nuts." And so I took a big bag a cashew nuts and I took a big package of M&Ms. He said, "You can survive a long time on that."

Stipe also carried supplies for gathering samples, collecting mostly just the pepper-like rhododendron seeds, due to a ban on exporting full plants. Despite having a permit to transport seeds out of the country, he came up with an ingenious plan to avoid the stringent regulations. "Some people who brought stuff out had been caught by Chinese and had some terrible times..." he told me, "so what'd we do? I mailed them." Later, as I ask Stipe if he had kept the infamous envelopes, he quickly had me chuckling as he explains why they didn't arrive in the best of shape. "One of the problems that I had was the Chinese stamps didn't have sticky on the back of them. Now I don't know what their idea was: I guess they wanted you to buy glue. So I got some jam and smeared on the back of the stamp. And I'm not sure they all showed up here, because that wasn't the best way to secure stamps to the envelopes. But some of them did, anyhow."

The trek through China was incredible, and enormously taxing. Stipe takes me on a walk through his garden and points out the massive and hardy rhododendrons that he has cultivated from the trip's seeds. "We saw plants that were a hundred feet tall," he tells me, "rhododendrons that had big trunks on them..." The rhodies in Stipe' yard, while not quite this big, are equally impressive in vigor and variety. As we stroll through the acres, I ask Stipe about how he became more involved as a grower. "I joined the American Rhododendron Society shortly after I moved to Seattle," he begins, "I knew about Mrs. Meerkerk...she and her husband owned property here...and he had 51 acres out here on Whidbey Island." The land, bequeathed after the Meerkerk's death to the Seattle Rhododendron Society, was finally dedicated as hybridizers test garden. As plant samples from all around the world began arriving, the team including Stipe worked hard to clear and cultivate the land. "We got quite a few: from Germany, Scotland, quite a few from the US. So we'd plant three of each variety. And the idea was to test them to see how they'd do on Whidbey Island... every summer we would ask members to come up and evaluate these hybrids and rate them... once a year, I would put that data all together and publish it. And the results would show up in the Rhododendron Society Journal."

Stipe stayed at the forefront of Meerkerk garden creation until he finally became the manager. In this position he labored many hours to ensure that more than just hybridizers would enjoy the beauty of Meerkerk. "I worked to open the garden to the public. Before then there was no way to have people come in and enjoy the garden." While manager, Stipe kept areas in constant change, moving plants and landscaping entirely new sections to keep guests coming back again and again. Innovative as always, he described to me how he had enlarged the garden substantially. "Even over at Meerkerk, I started clearing land that had never been cleared before because I always wanted to plant a new garden."

Rhododendrons were a continuing passion for Stipe as he evolved from his station at Meerkerk to begin clearing and planting his own fifteen acre jungle. As he did this, a simultaneous project arose of a beautiful two-story house, built from the ground up. Beginning in 2000, Stipe and his wife moved into a small apartment on the property, and began construction that took over four years. There was obvious and legitimate pride in his voice as Stipe spoke to me about his now entirely completed home. "This is probably my best accomplishment. I designed this house from scratch, built it and lived in it, and I can't find anything wrong with it." Stipe's garden posed, and still poses, another enormous challenge with acres of land to cultivate and upkeep. His natural innovative spirit has come to his aid many times in problem solving on the property. In one case, he designed and developed a brand new tractor attachment in order to carefully remove plants from the ground and move them about.

This same creativity, focused now on genetics, has allowed Stipe to become one of the best known hybridizers in the Northwest. "I'm most proud of my 'Amiblue'," he tells me. "I've propagated, and I sell a lot of them. As a matter of fact, I just got word from a friend down in Oklahoma...And he said, "Bill, it's grown for five years!" And Oklahoma gets terribly hot in the summer and cold in the winter, and he said, "I lose a lot of plants every year that I try, but 'Amiblue' is still alive." Stipe's network of friends through the society reaches beyond the United States however, something he is very appreciative of. "I've loved meeting people from all over the world in the Society. I guess I could count a thousand friends...at least. And getting together at the conventions, we share friends' stories and memories and achievements... I belong to a lot of different organizations, but the Rhododendron Society is probably the friendliest."

Stipe's natural inclination to create has had to come with a healthy dose of patience. In describing the lengthy process of making crosses, I can see his keen interest is willing to wait the years it takes to gain success. "So it takes you four or five years," he says about certain hybrids, "but I'll do that every year, so every year I've got new ones. And I anticipate what they're going to look like. And that keeps me interested."

Sitting in the glowing warmth of his timbered home, the view of his gorgeous multi-acre garden out the window, I ask Stipe from where his inspiration to create beauty developed. "Well, I think it's a very interesting thing..." he tells me, instantly serious. "I mean, just the very fact that you can take a seed, which looks so insignificant, and contain all of the elements of a fantastic plant.... It's hard to classify. My passion is growing things. Let's put it that way."

"A" is for Rhododendron albrechtii

I keep a wish list of rhododendrons I want, and at the moment, the species R. albrechtii is included in the top three of my list.  I grew it in my old garden, but sadly, when I moved, it was one of the plants I had to leave behind.  I haven't found a replacement plant for sale yet, but I keep looking, and after all, the hunt is almost as much fun as growing the plant.  I may have to break down and order some seed of this species as it's not commonly available in the trade as established plants.

R. albrechtii
photo by Tijs Huisman

Why do I like it so much?  Well, in bloom it's such a sweetheart!  The plant I grew had deep cerise-pink flowers, two or three to a cluster, and each flower was almost 2 inches across in size.  In doing a bit of internet searching, I see other growers report floral colours ranging from the deep rosy pinks into the purple reds, and up to 5 flowers per cluster.  In the Pacific Northwest, R. albrechtii usually blooms in mid to late April.

The plant, native to Japan, is a deciduous azalea, and the leaves on my "old" plant turned a lovely yellow before they dropped in the fall.  I'm not sure if fall leaf colour is a constant for all albrechtii plants, but it's nice when it happens.  I had my plant situated on the north side of the house, but it got good light from mid-afternoon on into the evening.  It prefers areas with cooler summer temperatures, so avoid planting sites that receive hot temperatures and mid-day sun.  The usual recommendation of even soil moisture applies.  Plants grow to a height of about 4 feet, so R. albrechtii is a good choice for the small garden, or even a large container.  It's also a good choice for woodland plantings. Do keep an eye out for this great little plant – it should be on everyone's wish list.

"A" is for 'Alison Johnstone'

I first saw Rhododendron 'Alison Johnstone' in a garden in the Oakland California area on a tour organized by the local chapter hosting the ARS conference. I can't remember the year, but I think it was in the late 80's or early 90's. I simply fell in love with "Alison" and started a hunt for a plant upon my return home. I was lucky enough to find one, but at the time, I was living in an apartment so I had to grow it in a container on the balcony. Some 20 plus years, and three moves later, it is still in a container, albeit a much larger one (a 90 liter pot) than when I started.

R. 'Alison Johnstone'
photo by Stuart Imrie

"Alison" blooms reliably every spring, and it's the flower colour that continues to attract me as it is such a curious colour. The flowers are not a true pink, but have almost an amber undertone which makes the colour hard to describe. I don't know of any other rhododendron that has quite the same flower colour. In addition, the foliage has a definite bluish cast which provides interesting foliage throughout the year.

Since my original plant is so big, I find the thought of trying to plant it in the ground too daunting, so this plant will spend its entire life in a container. Using a slow-release fertilizer, I fertilize at least twice a year: early April and again in late June and the plant gets lots and lots of water. Other than deadheading and maybe a bit of judicious pruning, this is all the care this big plant gets, but it seems happy and puts on new growth and flowers well each year. Others have told me that their 'Alison Johnstone' plants occasionally suffer from mildew, but I haven't found this to be a problem. However, I have a windy garden so my plant gets lots of air flow. I now have a second plant (won it in a raffle at one of our club meetings this spring), and this plant will get planted in the ground this fall.

Now, here's a curious problem I've never encountered before. I noticed earlier this week that there were suddenly dozens of healthy new leaves of my 'Alison Johnstone' lying on the ground around the plant. My other rhodies nearby were fine and I couldn't find any evidence of disease or insect pests that might be responsible. We haven't had any big wind storms recently, so that wouldn't have caused the problem either. I kept on going out and checking, and all I could find were yet more young leaves on the ground. Then, last evening, I noticed the leaves and branches were moving slightly, and sure enough, leaves fell off. I'm thinking, EEK, A RAT! - or something equally awful, but after watching for awhile, out popped a small wren. Since then, I've seen the wren flying in and out of the plant, and every time, more leaves appear on the ground. The bird doesn't appear to be eating anything, nor does it seem to be making a nest or using the leaves for anything. I know birds often break off small branches for nests, but this behaviour baffles me: I've never seen anything like it before, nor heard about this kind of behaviour. So if any of you bird watchers know why the wren is doing this, I'd love to hear the explanation. The only thing I can think of is that the wren shares my love of 'Alison Johnstone', but really, enough pruning already!

The Search For Gold -
A Lifetime of Organic Artistry

To craft something "better" has always been man's aim. Horticulturalists have, throughout time, taken this to heart as the attempt to combine beauty and form, sculpting nature to create the previously impossible. Around 1968, rhododendron hybridizers were faced with a challenge to not simply combine species, but to give life to something that had never before existed in nature: the golden rhododendron.

"There was a breakthrough in yellows…" says Frank Fujioka to me as we sit in the warm light of his kitchen, sun setting on the beautiful view of Puget Sound out his bay windows. “…Everyone had to work for yellows, and we didn’t think much about what the plant looks like. Some…were really sprawled ugly things, but if you had yellow, wow! That was what was really important."

Fujioka continues on to explain that the closer a rhododendron was to deep, pure daffodil yellow, the better. Many hybridizers simply combined white flowers with cream in hopes of drawing out the elusive shade, a system which Fujioka himself employed in the beginning days. "You get tired of getting poor results!" he confided in me, "so you think, there must be a better way". Thus, a more scientific approach was discussed. "You achieve your goals faster, I think, if you studied the genetics." You can't just combine this with that and hope for a miracle. "Sometimes you get pink!"

Fujioka stud book

When asked if he recorded all of the genetic data by hand, Fujioka laughed. "No… just the names of the parents," he told me, flipping through page after page of meticulously typed and hand written records in a binder. You first consider that "this parent used this species" and then you follow through many generations, studying it. "That became the fun part," he quipped with a revealing grin. The binder Fujioka shared with me listed hundreds of "nicknames" for crosses that he had created and were still in the testing stage. These nicknames were not to become the final registered titles of plants, but instead held a personal flair, ranging from Hawaiian Islands to family members. "Waikiki" and "Clarice" served only to keep complicated multi-generational hybrids straight. When I questioned Fujioka as to what percent of his experiments had become registered hybrids, his answer was a astonishing “not many.” I listened, impressed, as he explained to me his demanding process for testing all of his hybrids before submitting them to the registry. “[I] feel that if there is going to be a plant floating around… then the homeowner who buys that plant should be able to succeed…if this spring I come out with a plant I really like, I’ll …grow them out in the field. There it is exposed to full sun and minimal care, and I’ll evaluate how well they do. I’ll also dig them up to see what kind of root structure they have because that’s the key to a good plant.” This time-consuming method was not just for Fujioka’s benefit however; he also implied that it was in the best interest of the society. If a new grower attempts “to grow [a rhodie] and it dies…pretty soon you’re saying ‘oh, rhodos are no good.’ So it’s not good for our reputation.”

Fujioka hybrids

Beyond the complicated genetic tracing, growing new varieties of rhododendrons is no easy task, and certainly not one for those interested in instant gratification. “It’s a long process,” said Fujioka about hybridizing. Often he spends up to six years growing a plant that is simply one more step in the direction of his end goal. More often than not however, he has a strategic plan. “Sometimes you’re thinking three generations ahead,” he tells me. This was certainly the case in his work towards the ground-breaking discovery of a golden rhododendron. For Fujioka, resounding success came after many years in the form of a stunning bloom called ‘Seaview Sunset’ who’s beautiful coloring seems to “glow” in certain lighting. The popularity of this hybrid, registered in 1988, has increased exponentially, and has become a favorite in the Northwest and beyond.

But Fujioka shared with me that he hadn’t always been so scientific in his approach. As a child his only gardening experience had been pulling out his mother’s carrot plants and shoving back any that were too small, in fruitless hope they might continue growing. Later as a high school psychologist in Edmonds, Washington, he found his interest in gardening blossomed from practicality after purchasing his first home. “It was a small little old house, but it just didn’t have anything. Just green grass, that’s all it was.” So off he went to the nearest nursery, and asked for some plants to fill the empty space. What caught his eye, of course, were the laden blooms of the brightly colored rhododendrons. Disappointed by the fact that there were no, in particular, red rhodies for sale, Fujioka asked the nurseryman for recommendations and went off on a quest. He described in detail his impressions after entering one specific nursery; “I went in there and (this was in the spring) it was like magic. There were acres and acres of these big plants full of flowers…and then the old man came out.” This ‘old man’ he would later discover to be Halfdan Lem, one of the premiere pioneer rhododendron hybridizers in the Northwest, and a true friend. Back in his kitchen, Fujioka’s smile widened as he told of asking Lem for ‘The Honourable Jean Marie De Montague’, the most generic red rhododendron, and being refused. “He said to me…‘I have finer things.’”

Halfdan Lem was only the first of many inspirational and lasting friendships Fujioka made through his love of horticulture, many of which took root through his association with the American Rhododendron Society. Fujioka shared with me that although he had originally joined the Society to learn (there was a dearth of accurate rhododendron information at the time), he instantly found that that ‘plants people’ were some of the nicest you’d meet. I could barely keep from crying from laughter as he animatedly described an experience that illustrated a community as unique and wonderful as the plants they propagated… “One of the most fascinating things to me was how uninhibited everyone was in terms of enjoying what we were enjoying. I wish I had a camera at that time! There were three hefty guys, kind of fat, you know? And there were two of them talking, and a third one appears…with a rose! He said, “look at this! Smell this!” So here are three hefty guys sniffing a rose. That’s the kind of people I like, just comfortable with themselves. That made a big impression on me. I thought, “ok, that’s it. These are the kind of people I want to hang around with.”

Although Fujioka’s race to hybridize a golden rhododendron is now long over, the excitement of producing an original creation is still very much alive. This excitement is what he longs to share with the next generation. “I keep looking for young people to recruit so we can pass on our information, but there aren’t many...I think they’re too busy doing other things. So horticulture in general is suffering because we’re not able to get young people interested in horticulture. Maybe they’ll get tired of whatever they prefer doing and decide that working with dirt is more fun, more fulfilling.” Fujioka suggests what we must tap into is the part of ourselves that loves to create. He tells me of the artistry of gardening and relates it to classic painters and sculptors. While strolling slowly through his garden later, he points out the importance of the variation of greenery in a garden layout, relating it to the artistic movement monochromatism. “We have within us this innate creativity, but many of us were never allowed or encouraged to explore it…so I try to look for that in young people and if I sense that they have that, then I go from there…You know, you don’t need a magic wand!”

Despite being a true artist, friend to many, innovator, and one of the most influential hybridizers of his time, Fujioka has a surprising answer when I ask him what he would most like to be remembered for. “That I was a nice guy. You know, to me, that’s the bottom line.”

Those Pesky Labels!

When I first started growing Rhododendrons, I just had a few plants so it was easy to remember their names, but as my collection has grown, I find myself trying to remember which plant is which, and this has started my love/hate relationship with labels.

I think all gardeners want labels that are inexpensive, that last forever, stay in place and do not harm our plants.  And, since we don't want to see little white stakes all over the garden, which is just too reminiscent of a cemetery, we want something that is unobtrusive as well.  Finding something that fulfills all these wishes is hard and I don't think anyone has designed the perfect label yet.

The plastic, ribbon-like tags that come with most garden centre plants these days last a long time, but the print fades fairly fast and they can girdle the plant stem they're attached to if you happen to forget to loosen them periodically  Anyway, they don't look very nice in a garden setting

There are several problems in using plastic, stick-type labels.  First, you have to find something to mark them with that doesn't fade over time.  Permanent marking pens like the Sharpie pens school children use are o.k., but the ink eventually fades.  I find a lead pencil works just as well as a marking pen and usually outlasts the "permanent ink" writing.  In addition to looking a bit like grave markers, the stick-type tags don't work very well for long-term use because they become brittle and snap after a couple of years.  I've had to piece together old broken tags to decipher plant names on several occasions.  And, finally, tags just stuck in the ground are tempting targets for pranksters to pick up and move around.  This is a problem in one of our local public gardens.  Pranksters don't have to be human either - one Spring, I used stick tags to label a new collection of daylilies.  The crows just loved the tags and pulled them out of the ground.  I found tags all over the place - repeatedly!  Fortunately, I'd made a map of where various daylilies were planted so I was able to re-tag the plants correctly.  Wooden tags (some gardeners use popsicle sticks) have all the same problems as plastic ones, plus the wood rots or splits, so this isn't a good permanent solution to the tag problem

My own favourite labels are the soft aluminum tags where an old ball point pen is used to "engrave" the plant name into the metal.  These are attached to plants with a twisting wire.  They aren't too bad, except the wires can girdle plant stems if not loosened periodically.  If you use these, make sure you press hard when writing on the plant name because in time, it can be hard to read the "engraving".

One couple in our local ARS chapter have beautiful tags made of cut up aluminum gutters.  They use a Brothers P Touch machine to create labels that have a glue-backing that sticks well to the aluminum.  The tags are long lasting and easy to read, but I don't have a supply of aluminum gutters around, nor do I have the right kind of saw to do the cutting, and even if I had both, I think I'd be too lazy to make them.  I do like getting plants from them though because in addition to growing lovely plants, their labels last for years.

Some people advocate putting a label underneath any plant that is going in the ground at planting time.  Either plastic or metal would be o.k. for this.  The idea is that if the above ground tag is lost and you can't remember what the plant is, you could, at least in theory, dig up the plant and check the label.  I do know people who "plant labels", but to me, this is one of those suggestions that sounds o.k. in theory, but is impractical in the real world.  Can you see yourself trying to dig up some big Rhodendron Loderi to find the label?  However, I do slide an extra label down the side of all of my potted plants as these tags are fairly accessible in a pinch

As a failsafe method, I try to keep a map of my garden beds showing roughly where I’ve planted  things.  This is useful as long as I take the time to update the map periodically.  For some reason, I find it easier to move a plant than to change the map record.  A couple of friends who are rock garden enthusiasts showed me their most recent method of keeping track of their plants.  They take digital photos of a bed, then using Power Point, they label all the plants in the image.  This seems like a good idea although there is still the issue of actually getting around to updating any changes.

One thing for sure though is to watch out that tags that are wrapped around Rhododendron stems do not get too tight.  Every now and then, take a tour around the garden and loosen up wires or ribbon-like tags.  Happy labeling!

Early Blooming Rhododendrons

While it's still early January, I've started to watch for Rhododendrons in bloom. Here in the Pacific Northwest, there aren't many yet, but I've seen a few brave trusses of what I think are 'Christmas Cheer' and 'Nobleanum'.  Since the plants I see belong to someone else, I have to guess at the varieties.

The pale pink flowers of 'Christmas Cheer' look so delicate, but this is a tough hybrid.  With mild winter temperatures, the flowers last for weeks although one hard frost will damage them.  On the plant that I think is 'Nobleanum', the flowers are rounded balls of deep rose pink.  I can't get close enough to the plant to see if there's a flush of white in the flower centers, but this would be typical of the variety.  'Bo Peep', another very early hybrid I see, is also just about to bloom.  This small yellow flowered plant won't win prizes for showiness, but how can you not like anything that is in flower now.

R. 'Seta'

In my own garden, 'Seta' is the earliest of my rhododendrons to bloom.  I just love this hybrid.  The flowers are tubular: light pink inside with dark pink backs.  'Seta' is loaded with flowers every year, and blooms reliably for me by mid-March.  I have one 'Seta' in a large container that I move onto the deck when it's in bloom and I like this variety so much that this past fall, I planted another one in the garden.

'Snow Lady' is another of my early favorites, and it also blooms for me in mid-March.  In addition to lovely white flowers, the leaves are hairy, adding another interesting dimension to the plant.  The leaves are particularly pretty when there's a bit of dew on them.  I grow 'Snow Lady' in a container, and it looks great when placed next to 'Seta'.

Both 'Seta' and 'Snow Lady' tend to get leggy, but who cares!  They're great harbingers of spring.  I could pinch them back a bit after blooming, but I like their open habit.

R. 'Cilpinense'

If you like the look of these varieties, another variety to look for is 'Cilpinense' (photo right).  Another of my favorite early bloomers is R. mucronulatum 'Cornell Pink'.  I like the pale pink flower color, but many people in our area prefer the more intense fuchsia-pink flower of 'Crater's Edge'.

Some of the species that bloom early for us in our area are super plants.  R. dauricum, R. moupinense, and R. strigillosum all bloom in late winter or very early spring.  R. dauricum covers itself in small flowers of either intense fuchsia-purple/pink or pure white flowers.

R. moupinense is a hardy pink flowering rhodie.  The species has white flowers with small, red blotches.  If you like red, then R. strigillosum is for you.  This is a stunning early bloomer.  In addition to the lovely flowers, R. strigillosum has hairy bristles along young stems, which are very pretty, especially when backlit.

To give yourself the longest possible chance for blooms to persist, you need to locate early blooming plants in an area where they receive some overhead protection from frost.  My neighbors actually cover their 'Christmas Cheer' at night with a blanket if hard frost is expected during blooming time.  By doing this, most years they are able to keep the plant in bloom until mid to late March.

Appalachian Spring Event

"Appalachian Spring", the 2012 ARS-ASA International Convention takes place May 4 – 7, 2012 in beautiful Asheville, North Carolina, in the heart of the picturesque Blue Ridge Mountains where native azaleas and rhododendrons burst into bloom every spring.

Visit the event's enormous plant sale. Over 3,000 plants are being grown for the sale, featuring the hybridizing efforts of local plants men James Harris, Velma Haag, George Beasley, Augie Kehr, James Todd, Don Johnson, Kelly Strickland, and Earl Sommerville.

Four fabulous days of tours are planned for your enjoyment and wonder. We will be visiting a variety of beautiful gardens in Asheville and Hendersonville, North Carolina, and just across the border in South Carolina.

Tours include the Biltmore Estate and Gardens, this Frederick Law Olmsted designed estate has the largest single family home in America, the Charles Dexter Owen Garden, with a large collection of Dexter hybrids, the North Carolina Arboretum, whose 65 acres of cultivated gardens pay tribute to the region's rich cultural heritage, and the Ed and Mary Collins Garden, featuring dwarf rhododendrons, evergreen and deciduous azaleas, dwarf conifers and may perennials, wildflowers, and unusual trees.

Other gardens open for touring include the James and Mary Ann Stewart Garden, previously owned by Dr. August "Augie" Kehr, with one of the largest collection of magnolias in the U.S., the Bob and Audrey Stelloh Garden, with many native wildflowers, mountain laurels and thousands of choice azaleas and rhododendrons, and the Doley and Melody Bell Garden with an estimated 3000 rhododendrons, including Dexter, Haag, Leach, Kehr, Gilkey, Delp, Van Veen, Richardson, and Lee hybrid rhododendrons, and Glenn Dale, Back Acre, Exbury, and Girard hybrid azaleas.

Guest speakers at the event include: Don Hyatt - talking about plant diversity in the Southern Appalachian Mountains, Nicholas Yarmoshuk and Christina Woodward - discussing cold-hardy rhododendrons for diverse locales, and Dr. Thomas Ranney - talking on how the unique azaleas found on Gregory and Wayah Balds in the Appalachian Mountains evolved from complex hybridization among the native species.

Both members and non-members are welcomed at the 2012 ARS-ASA International Convention. We hope to see you there!

Blue Rhododendrons

We are all looking for that blue rhododendron, but last time I looked all of the ones with "blue" in their name had purple flowers.  'Blue Admiral', 'Blue and Gold', 'Blue Angel', 'Blue Baron', 'Blue Bird', 'Bluebell', 'Bluebird', 'Blue Blood', 'Blue Boy', 'Blue Chip', 'Blue Cloud', 'Blue Crown', 'Blue Danube', 'Blue Dawn', 'Blue Diamond', 'Blue Effect', 'Blue Ensign', 'Blue Flame', 'Blue Frost', 'Blue Girl', 'Blue Hawaii', 'Blue Haze', 'Blue Heaven', 'Blue Horizon', 'Blue Ice', 'Blue Jay', 'Blue Lady', 'Blue Lagoon', 'Blue Light', 'Blue Mist', 'Blue Monday', 'Blue Moon', the list goes on and on.  It is obvious that the hybridizers wanted blue, but alas, the blue gene is not to be found in the genus Rhododendron.

Mind you, some of these rhododendrons are nice plants, but their flowers are definitely not blue colored.  I am even responsible by naming a hybrid 'Amiblue'.

So, let's look beyond the flowers, they are only visible for a short time anyway.  How about foliage?  There are many rhododendrons with blue leaves, well almost blue, closer to dark greenish blue, but quite evident in the garden among the other shades of green.

My favorite blue rhododendron species are: R. campanulatum ssp. aeruginosum, R. clementinae, and R. lepidostylum.  I am sure there are many other also, but those are the ones I have in my garden.  These are generally not found in your local garden center, but are available from many specialty rhododendron growers, such as the Rhododendron Species Botanical Garden.

I am sure some of you may have other blue rhododendron ideas, and I welcome your comments on this blog.

Give Deciduous Azaleas A Try

A couple of years ago on one of our bus tours to visit local Rhododendron gardens, I got talking to the man sitting next to me, about, guess what - Rhododendrons.  He was considered one of our local "rhodie" gurus and was quite a character.   As our conversation progressed, I told him how much I liked deciduous azaleas, and tongue in cheek, he said that nice Rhododendron people didn't do azaleas.   Well, I guess I'm not a nice Rhododendron person, because I just love them.  This spring, my azaleas were late because blooming didn't start until the very end of May, but they put on a wonderful show throughout June.  This fall, I'll get a second show from them when their leaves turn red before dropping.

deciduous azalea

With deciduous azaleas, there are flower colors to meet everyone's tastes, from intense, "in-your face" oranges to soft pastels.  As an added bonus, most varieties are fragrant.  Among my plants, I've got pure white 'Oxydol'; a gorgeous strawberry pink of unknown variety, as it was here when I moved in; 'Western Lights' which has pink flowers; a few yellows, including 'Northern Hi-Lights', 'Old Gold' and 'Apricot Surprise', and deep orange 'Mandarin Lights'.  And then, there's gorgeous 'Irene Koster', which is a fragrant R. occidentale hybrid whose flowers open soft pink then fade to white, and 'Daviesi' which has fragrant, cream colored flowers.  These last two plants are in a semi-shaded location and while happy enough, would benefit from having a bit more sun.

My plants are scattered throughout my garden, with most growing in sites that get full sun, and in the summer, these sites are hot and dry.  One of the reasons I'm so fond of deciduous azaleas is that they are tough, low maintenance plants.  I water them about once a week, but that's all the care they get.  They also seem to tolerate heavy soils better than many plants.  Deciduous azaleas are winter hardy, and for anyone living in cold areas, look for varieties that were developed by the University of Minnesota, as some of their hybrids are hardy to -40 degrees (and that's -40 in both the Fahrenheit and Celsius scales) - look for names that include the word "Lights", as in 'Northern Hi-Lights', 'UMinn's Lilac Lights', 'Lemon Lights', 'Golden Lights', etc.  Most of these will be from the U. of Minnesota breeding program.

So, if you don't have any yet, consider adding some deciduous azaleas to your garden: they're adaptable, hardy, have fall color and gorgeous, fragrant flowers.  Not a bad choice even for those of us who aren't nice.

Rhododendron Blog Created

Welcome to a new blog devoted to the topic of Rhododendrons.  The blog is sponsored by the American Rhododendron Society, a non-profit organization whose purpose is to encourage interest in and to disseminate information about the genus Rhododendron.  Whether a seasoned-pro or growing a rhododendron for the first time you will find many articles of interest presented in this blog.  Reader comments are solicited.

Pruning Rhododendrons

As a Master Gardener, I am often asked about pruning rhododendrons.  There are several reasons for pruning with different timing and methods.  The main reasons are;  1.) removal of spent flowers (deadheading), 2.) removal of dead, diseased, or damaged branches, 3.) shaping of the plant, and 4.) plant rejuvenation.

Deadheading
Removing of the flower after it starts to fade not only improves the look of the shrub, but focuses the energy to making new growth versus producing seeds.  On most rhododendrons deadheading is accomplished by pinching the truss at the base with a slight twist.  It can also be accomplished with a small pruning shears such as a long nosed grape shear.  There will be new buds emerging just below the truss, so be careful not to damage them.  It will be easiest to deadhead early before the new growth has started to grow.  If the plant doesn't set seeds, it is not necessary to dead head.  Small-leafed rhododendrons rarely need deadheading.

Maintenance Pruning
Removal of dead, diseased or damaged branches can be done at any time, the sooner the better after it is recognized.  Depending on the size of the branch, it may require the use of pruning shear, loppers or saw.  Be sure to make the cut below the diseased part and burn or send it away in the garbage.  Broken or dead branches should be cut just above a dormant bud.  There may be inside branches with buds that do not see the sun that can also be removed because they will eventually die.

Shaping
Pruning for shape enhances the rhododendrons form and habit.  Depending on the landscape, the rhododendrons shape is important.  For instance, tall rhododendrons should not be placed where they will obstruct the view or other landscape features.  All rhododendrons can be pruned to maintain their natural habit, but to try to keep a tall growing rhododendron small or low growing is not practical.  Pruning for shape should be accomplished in early spring to early summer, but not after July 1.  Later pruning will encourage new growth which may not be hardened off prior to first frost and subject to damage.  I prefer to prune for shape before the new growth emerges, in February or March. Early pruning will most likely remove some flowers the first year, but will assure more blooms the following year.  Pruning after the flowers fade is another alternative, but reduces the flowers the next season.

Rejuvenation Pruning
As rhododendrons age they lose vigor and often become open and ungainly.  As a consequence, they lose much of their value in the landscape.  Rejuvenation pruning, sometimes major, can solve the problem.  The larger-leafed rhododendrons have many dormant buds that can be forced into new growth.  However, on very old wood, the dormant buds may have atrophied and are not viable.  So there is some risk that drastic pruning may not be successful.  But, by pruning just above viable dormant buds, new healthy growth can be directed to obtain the desired shape.

Some nurserymen recommend cutting back one third of the branches over a three year period.  I prefer cutting the entire plant back to the height desired early in the season before new growth emerges.  That may result in a loss of blooms the first year, but will result in a better shaped plant in less time and will have added blooms the next year.  A word of caution however, the plant will have a large root system and may produce excessive new growth.  To counteract this, I use a spade to chop off 50% of the roots at the drip line.  This will balance the uptake of nutrients to the now reduced branch and leaf structure.

It may be difficult to see the dormant buds of some varieties.  For these plants prune the branches back to the desired level and after the new growth emerges, prune off any stubs that remain.

Flower Show Tips

flower show

Lots of flower shows are coming up, and it's fun to enter Rhododendron trusses and plants.  If you're after winning, there are some "tricks of the trade" that help.  First of all, you have to read the instructions for the show.  That's where you find information about the time to place your exhibits, how they are to be presented and the different show categories available.  Once you've got that information, start watching your plants for likely candidates.  I like to keep an eye on things starting about two weeks ahead of a show, but in the end, it comes down to what looks good on the day entries are picked to be entered.  Often, the "perfect" truss is not quite ready or too far gone.  C'est la vie in the world of flower shows.

With trusses, if at all possible, choose one from the top of the plant so that the truss is full and balanced on all sides.  Sometimes there isn't any choice available and you have to take one from the side of the plant, but if this is the case, take the fullest truss you can find and the one with the most flowers possible.  Most of the flowers should be open, but if the topmost buds have good bud colour even though they haven't quite opened, that's o.k., and in some cases can work to your advantage.  Usually you have to place your entries in a show anywhere from 6 to 12 hours before the actual judging happens, so the topmost buds might open while sitting on the show table.  Hopefully the show hall will be cool, but sometimes it isn't, and then you're faced with having a truss that's too far past its peak by the time the judges come along.

To prepare, each truss needs careful grooming. I use forceps to remove any bits of bract that may have fallen in between the flowers.  When it comes to leaves, it's really nice to have a ring of leaves up near the flowers, sort of like a green collar.  But, sometimes the leaves are ratty looking and then there's the conundrum of whether to remove them or not.  Before snipping, I like to check the show catalogue to see if there's any statement about leaves needed in the presentation or not.  Then, depending on what's permissable, sometimes I leave them on, sometimes I remove them.... it usually comes down to a gut feeling at the moment as to what will make the truss look its best, but generally, judges like to see some leaves.  The base of the stems get cut on a sharp angle and immediately inserted into tepid water.  Fresh cut stems absorb warm water faster than cold water.

Different groups use different containers for their shows, so... read the show instructions.  You at least need to balance the vase size with the truss size and you also have to come up with some way of getting the flowers to sit up-right in the vase and not flop all over.  Locally, lots of us use clean beer bottles, labels removed of course, (and if you need bottles, it gives you a good excuse to drink beer).  These work well for fairly large trusses since the bottles are heavy enough to sit securely on the bench and the narrow neck holds the stems up-right.  Sometimes though, the trusses need a bit of help and something has to be inserted into the neck of the bottle to hold the stem in position.  Anything you can think of that is unobtrusive is good.  Some people use small bits of florist oasis, others use wine corks that are sliced in half (an excuse to drink wine) - use whatever you can think of.  Trusses of the small rhodies can get lost in a beer bottle, so look around for little bottles (old spice bottles aren't bad), and again, get the trusses inserted into water quickly.

Trusses need to be labelled and put into the correct class.  Fill in the information needed for each entry and hopefully you know the correct variety name.  However, if you don't, just make sure the truss goes into the right category, like red flowered, or trusses under 6 ", where ever it fits.  Sometimes someone will recognise your unknown variety and identify it for you.  As well, there are usually people around to help you figure out where to put things - just ask.  That's all there is to it.  The judges do the rest of the work and you get to come back later to see a hall filled with colour, and maybe you'll come home with a ribbon or two.

Rhododendron 'Mary Fleming'

Rhododendron 'Mary Fleming' is in full bloom now.  This well-behaved plant is a nice addition to a border or small garden since it doesn't get very big, maybe 3 feet tall or so in 15 years.  In addition to the plant itself being small, 'Mary Fleming' has small leaves, and like many small-leaved rhodies in my garden, R. 'Mary Fleming' can take full sun.  The old adage is the smaller the leaf, the more sun a Rhododendron can tolerate.  Having said that, however, I do like to plant my Rhododendrons in locations where they get some shade during the hottest part of the day during the summer.

R. 'Mary Fleming''Mary Fleming' has pale yellow flowers tinged with pink and the combination blends well with other flowers.  I looked up the parentage of this hybrid, and it's a cross between two nice lepidote species, R. racemosum and R. keiskei.  What the breeder (Nearing) did was to cross these two species to create a plant that became one of the parents of R. 'Mary Fleming' and then he crossed this hybrid plant back to R. keiskei in what is called a backcross.  Presumably, the pale yellow colour of R. 'Mary Fleming' comes from the keiskei genes while the soft pink comes from racemosum, as does the free flowering habit.  The parent species are also nice plants for a small garden.  I grow both, with R. keiskei in a container and R. racemosum in the ground.  Neither of the parents is in bloom just yet, although flower bud colour is showing.  With a little luck on timing, R. keiskei may be in bloom for an up-coming flower show and if it is, I will enter it into the show.  Being small, it won't draw the "oohs and ahs" of some of the big-flowered Rhododendrons, but it's so sweet, it deserves being shown.

How I Became a Rhodoholic

I guess I'm a rhodoholic, at least that's what my friends say.  I became afflicted when I moved to the Seattle area back in 1956.  I came from the dry, cold side of Washington State where I had never seen anything like Rhododendrons.  It seemed like every home in Seattle had at least one if not more Rhododendrons.  I was fascinated with the bright, showy flowers of these evergreen shrubs.

The most popular Rhododendron was 'The Honorable Jean Marie de Montague' (most people just called it Jean Marie).  I couldn't stop there, I got a 'Blue Peter', then 'Taurus', and 'Nancy Evans' and 'Trude Webster' and the varieties seemed endless and I wanted them all.  Then I noticed that the species Rhododendrons had interesting leaf shapes and a fuzzy coating underleaf called indumentum and sometimes a coating on the top side called tomentum.  So I had to have R. pachysanthum and R. bureavii, and R. pseudochrysanthum.

I was obviously hooked!  I joined the American Rhododendron Society and started attending the meetings of the local chapter in Seattle.  That just added to my affliction as I got to know others with like interests.  Ther was so much to learn, so I had to get books about Rhododendron culture.  The book that was recommended was Harold Greer’s Guidebook to Available Rhododendrons.  Then I discovered Peter Cox had published a whole series of books on cultivation of Rhododendrons and I got them all.

My association with The Seattle Rhododendron Society (SRS) included volunteering to help maintain their Rhododendron Garden on Whidbey Island, Meerkerk Rhododendron Garden.  This is a 51 acre garden that was bequeathed to the SRS with the purpose of allowing the public to observe and learn about Rhododendrons and companion plants.  I eventually quit my job at Boeing to become the fulltime manager of Meerkerk.  Mrs. Meerkerk had planted many hybrid and species Rhododendrons, but the gardens had not been adequately maintained for many years and needed some tender loving care.  The goal was to make it a test and display garden to attract people interested in Rhododendrons, both local and tourists.  My wife Mary and I set about clearing the wild brambles and weeds that had all but taken over.

My interests gravitated toward hybridizing and my job at Meerkerk provided the many sources of pollen to accomplish that role.  I started growing my own hybrids and evaluating them for quality, hardiness, and susceptibly as a garden plant.

After 6 years at Meerkerk, Mary and I decided we needed a place of our own and found and purchased a 15 acre wooded lot not far from Meerkerk.  We now have a home and garden of our own where we can continue exploring the virtues of the genus Rhododendron.  I hope this affliction never ends because there is so much to learn.

Container Gardening with 'Rose Elf'

I have a smallish garden, but want to grow every Rhododendron I can since there isn't one I actually dislike.  To reconcile lack of space with my acquisitive nature, I grow lots of things in pots.  Right now, Rhododendron 'Rose Elf' is in full bloom and it's such a sweetie.  It's about 2 feet tall by 18 inches wide and the silly plant is literally covered in pale pinkish/lavender flowers.  The advantage to having containers is that as plants come into peak bloom, I can move them into prime viewing areas on the patio and deck.  So, right now, 'Rose Elf' is beside the front door getting admiring glances from all my neighbours.  Fortunately, I have a safe neighbourhood, and I'm not worried about plant thieves.

I was first introduced to 'Rose Elf' at a rock and alpine show - someone had entered it into the dwarf companion shrub class.  Isn't it funny to think of Rhododendrons as companion plants?  Rock gardeners like this variety because of its small scale and well-behaved growing habit.  And locally, 'Rose Elf' tolerates full sun exposure.

I've had my plant for about 15 years, and in that time, it's gone from a rooted cutting in a 4 inch pot to its current home in a 2 gallon container.  Over the years, I've obviously potted it on, gradually moving up the pot size as the plant grew.  I don't have an exact potting mix that I use every time, but typically, I mix well-crumbled peat moss, perlite and some fine bark mulch together as a starting point.  Lately, I've been adding some Sea Soil (this is a commercial composted bark mulch and fish waste product), and then, if it's handy, I mix in some sharp, coarse sand and even some garden soil.  I don't use exact measurements, but, more or less, I use equal parts by volume of the various ingredients.  I'm after a potting mix that holds some moisture, has good aeration, is dense enough to hold the plant in place and is on the acid side.  I don't worry about nutrients in the actual potting mix because I use slow-release fertilizers like Osmocote or Nutricote on a regular basis.  I top-dress my containers with fine bark mulch or on occasion, with pretty agates from my beach combing trips.  It looks nice, but more importantly, it helps prevent the soil mix from getting too compacted when I water or from heavy rain.

The major issue for my pots is watering in the summer.  There are times when I need to water on a daily basis, and that's o.k. with me, but to cut down on watering as much as possible, I move my pots to shady locations for the summer.  They get tucked under my apple trees, lined up under the eaves on the north side of the garage and I have an old patio umbrella that I set up to shade some of the larger containers.  It's amazing how the plants seem to thrive and just a bit of shade has cut my watering by about a third.  When I want to be away, I hire my neighbour's son to come and water.  I'll make a gardener out of that young man yet!

The World in Your Garden

One of the biggest dilemmas rhododendron gardeners face is whether or not to leave their own gardens for a few days to attend the American Rhododendron Society's Annual Convention.  Usually held in April or May, and alternating between the East and West coasts, these meetings aim to bring together 200-300 rhododendron enthusiasts to visit public and private gardens at their peak of perfection.  This year the Annual Convention is being held in Vancouver, WA on May 11-15, 2011.

Garden hosts often prepare for several years for these visits, grooming and primping their gardens to be seen by visitors from all over the world.  Plants are labeled, garden maps printed, neighbors roped in to help guide and sometimes even goodies baked for the guests.  These are after all some of the best of the best private gardens and some of the most knowledgeable people in the world about the genus Rhododendron.

Our first conference, 20+ years ago, was a big unknown.  Would we feel out of place or overwhelmed by the level of technical detail?  On the contrary, we found that this group of garden lovers were the most friendly and welcoming people imaginable.  This wasn't a technical conference this was a group of like minded individuals who gathered to enjoy the fruits of each others' labor.  It wasn't a series of lectures with garden visits, it was definitely a unique opportunity for garden visits with a several interesting lectures thrown in.

Most conferences seek to bring in speakers who are well regarded in their home area, but rarely available in the conference area.  This way a lot of local people will be interested in their presentations as well as those like us who have become addicted to traveling from far away.  This year the keynote speaker is Hartwig Schepker from Bremen - famous for being the organizer of the last year's fabulous 75th Anniversary Conference of the German Rhododendron Society.  It promises to be a very entertaining evening.

Read more about the ARS Annual Convention, and don't hesitate for a moment to leave your garden for a few days to go to the Vancouver, WA event, you'll have no regrets.

Spring Has Arrived

It's late March, and finally, spring has arrived in local gardens.  Here in the Pacific Northwest, we've had a troublesome winter - not difficult compared to much of North America - but with a couple of episodes of sudden cold spells that have led to some winter injury.  The really damaging cold came in late November, when temperatures dropped suddenly to -8 C after a mild, wet fall.  Lots of plants were still actively growing at the time, so hadn't hardened off properly.  We had a second cold snap here in late February (again to -8 C), but since plants were still dormant, this didn't cause many problems.  It was the early cold that hit things hard.

As spring arrives, I'm relieved to see that most of my rhododendrons will be o.k. although there is some flower bud damage here and there.  Most surprizing to me is the bud injury on my R. 'Nancy Evans', a variety usually considered to be an easy grower here.  There will be flowers, but perhaps not the usual "knock em dead" display.

The plant I'm most worried about is my R. lyi, which has lost a lot of leaves as well as its flower buds.  However, R.lyi isn't really hardy here, so growing it for me has been a case of zone denial.  I'm hoping for regrowth from the lower part of the main stem and of course, if it does die, there's always the thought that there's now space for a new plant.  Hmmm, we'll see.... So much for the sad news, we gardeners are really optimists, and most things will be fine and the spring displays great.

Rhododendron lutescens, one of my favourite species, is out full today, adding a soft, cheerful note to the garden.  If you like pale yellow, this early-blooming species is reliable, easy to grow and readily available, at least in our neck of the woods.  I've planted a fair number of daffodils in the same area, and there's tons of Muscari (grape hyacinth) coming up too, so the yellows and deep blue/purple really draw the eye to that part of the garden.