Plant Care Otanthus

Otanthus

About Otanthus

Otanthus is a super rare houseplant 🌿 that needs regular watering to thrive. They do best in long-lasting, direct light ☀️ and should be less than 1 foot from a window.

Otanthus likes soil that is well draining. Your plant shouldn't need added fertilizers if you repot each time it doubles in size.

Taxonomy

Achillea maritima
Achillea
Asteraceae
Asterales

Also known as

Otanthus, cotton weed plant, Otanthus maritimus and Otanthus maritimus

How to care for Otanthus

💦 Water

How often to water your Otanthus

Water needs for Otanthus
0.5 cups
every 9

Otanthus needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot.

Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.

Calculate water needs of Otanthus

Water 0.5 cups every
9

Does your plant get direct sunlight?

Select the pot size

5"
☀️ Light

Finding light for Otanthus in your home

Light needs and placement for plant Otanthus: 1ft from a window
1ft or less from
a window

Otanthus love being close to bright, sunny windows 😎.

Place it less than 1ft from a south-facing window to maximize the potential for growth.

Otanthus does not tolerate low-light 🚫.

Select your region to see how the current weather in your area affects the placement of Otanthus in your home 🏡.

🪴 Nutrients

How to fertilize Otanthus

Nutrient, fertilizer, and repotting needs for Otanthus: repot after 2X growth

Most potting soils come with ample nutrients which plants use to produce new growth.

By the time your plant has depleted the nutrients in its soil it’s likely grown enough to need a larger pot anyway.

To replenish this plant's nutrients, repot your Otanthus after it doubles in size or once a year—whichever comes first.

💡 FAQs
💦 Water Needs

Otanthus prefers for the soil to dry out between waterings and should be watered regularly. Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.


☀️ Sunlight Needs

Otanthus requires abundant, bright and direct light. Place it less than one foot from a window to ensure it receives enough light to survive 💪. Select your region to see how the current weather in your area affects the placement in your home 🏡.


🐶 🐈 👶 Toxicity

Greg does not have confirmed data on this plant’s toxicity. If you, a family member, or a pet consumes plant material of unknown toxicity, it’s always best to consult a medical professional.

If you or someone else ingested this plant, call Poison Control at US (800) 222-1222. If a pet consumed this plant, contact your veterinarian or the ASPCA at US (888) 426-4435.


🪴 Soil

Otanthus does best in well-draining soil. A good soil will contain lots of organic matter such as coco coir as well as perlite or vermiculite to help with drainage. Adding a handful of perlite to regular store-bought potting soil should do the trick!


💩 Fertilizer

Otanthus grows very slowly and doesn’t require added fertilizer. Replacing your plant’s potting soil once a year should provide them with more than enough nutrition. Remember, plants get their energy from sunlight, not fertilizer!


🧐 Troubleshooting

When troubleshooting a sad-looking houseplant, start by checking for signs of distress in its leaves, such as yellowing, browning, or drooping, which can indicate overwatering or nutrient deficiencies.

Inspect the soil moisture; too dry or too wet soil can cause problems.

Ensure the plant is getting the right amount of light, as too much or too little can stress it.

Finally, consider environmental factors like temperature and humidity, and adjust care routines accordingly to revive your plant.


Care Summary for Otanthus

Otanthus

Otanthus


Greg recommends:

Water

0.5 cups every 9 days

Placement

< 1ft from a window

Nutrients

Repot after 2x growth

Based on the 4” pot your plant is in, and that it doesn’t get direct sunlight.

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