Viburnum plicatum ‘Mariesii’ (Doublefile Viburnum)

The ‘Mariesii’ cultivar of Viburnum plicatum f. tomentosum is renowned for its exceptional horizontal branching that creates a distinctive layered effect, much like a series of shelves. This structural characteristic is elegantly offset by its large, showy, white lacecap flower clusters.

Viburnum plicatum ‘Mariesii’: An In-depth Look

Native: While the species Viburnum plicatum is native to Japan and China, the ‘Mariesii’ is a cultivated variety developed for ornamental use.

Plant Type and Habit: This is a deciduous shrub that features a broad, horizontal growth habit. Its branching structure is strikingly tiered, giving the shrub an architectural quality that stands out in landscapes.

Size: Doublefile Viburnum typically grows to a height of 10 to 12 feet (3 to 3.6 meters) and spread of 12 to 15 feet (3.6 to 4.5 meters), making it quite a substantial shrub when mature.

Flowers: ‘Mariesii’ boasts large lacecap flower clusters, up to 4-6 inches (10-15 cm). The outer ring of larger, sterile flowers is brilliant white, surrounding a center of smaller, fertile flowers. It generally flowers in mid to late spring, although the timing can vary slightly depending on the local climate.

Fruits: After flowering, the plant develops small, red berries that mature into black, adding interest in late summer and fall.

Foliage: The dark green leaves are ovate and toothed, adding texture to the shrub. The foliage turns a reddish-purple in autumn, contributing to its multi-seasonal appeal.

Hardiness: Generally hardy in USDA zones 5-8, it is a versatile plant that can tolerate a range of climatic conditions.

Award: Recipient of the prestigious Award of Garden Merit of the Royal Horticultural Society.

Uses: Due to its size and architectural form, it is often used as a specimen plant in gardens. It also works well as a focal point in mixed borders and is effective when planted en masse for screening purposes.

Wildlife: The flowers attract a variety of pollinators, including bees and butterflies, while the berries are a food source for birds.

Deer and Rabbits: The shrub has moderate deer resistance, which means it may escape browsing in areas with low deer pressure. Rabbits generally avoid it.

Toxicity: The berries are mildly toxic to humans if ingested but are generally not harmful to pets or other wildlife.

Drought: Once established, the shrub has moderate drought tolerance but prefers consistently moist soil for best performance.

Invasiveness: Find where this species is invasive in the United States. Discover beautiful U.S. native plant alternatives.

Benefits: This cultivar brings a host of benefits, including its layered, horizontal growth that adds architectural depth, its flowers that attract pollinators, and its fall foliage and berries that offer seasonal interest.

Key Facts: The most distinguishing feature of this cultivar is its unique, horizontal, “double-file” branching structure that gives it a tiered or shelved appearance. This, combined with its large lacecap flower clusters, makes it an eye-catching addition to any garden.

How to Grow and Care for Doublefile Viburnum

Light: Prefers full sun to partial shade. Ensure it receives at least 6 hours of sunlight for optimal flowering and foliage color.

Soil: Adaptable to a wide range of soil types but prefers fertile, humus-rich, well-drained, loamy to sandy soil. Slightly acidic to neutral pH is ideal.

Water: Moderate water requirements. Water deeply once a week, especially during dry spells. Overwatering or poor drainage can lead to root rot.

Fertilizer: Apply a balanced, slow-release fertilizer in early spring. Over-fertilizing can lead to excessive growth but fewer flowers.

Pruning: Best pruned immediately after flowering to maintain shape and remove any dead or damaged branches. Avoid heavy pruning, as it may reduce next year’s blooms.

Propagation: Propagate through softwood cuttings in early summer.

Pests and Diseases: No serious insect or disease issues. Keep an eye out for aphids, scale insects, thrips, or viburnum beetle. Occasional disease problems include leaf spot, root rot, and botrytis. Apply appropriate treatments as needed.

By following these care guidelines, you can ensure that your Viburnum plicatum f. tomentosum thrives, offering seasonal interest and aesthetic appeal to your garden.