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Astilbe Plant Care
Astilbe japonica (C.Morren & Decne.) A.Gray
Updated · Sources · How we source care data
Astilbe japonica, called false buck's beard, is a species of flowering plant in the genus Astilbe, native to Japan, and introduced in New York State. Its hybrid cultivars 'Deutschland', 'Montgomery', and 'Rheinland' have gained the Royal Horticultural Society's Award of Garden Merit.
Every 3–4 days
Part shade to full shade
60–75°F
50–70%
At a glance
How do you care for Astilbe?
Water Astilbe every 3–4 days, letting the top layer of soil dry out between waterings, and give it part shade to full shade. It prefers temperatures of 60–75°F (16–24°C) and 50–70% humidity. Fertilize it every 6 months during the growing season.
Where Is the Astilbe Native To?
What Is the Astilbe?
Astilbe (Astilbe japonica) belongs to the Saxifragaceae family within the Astilbe genus. Astilbe is native to Japan, and introduced in New York State. Astilbe is also known as Japanese Astilbe, False Spirea.
Astilbe displays a clumping perennial growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Astilbe produces feathery plume-like flowers in various colors like pink, red, white, and lavender.
Leaf size: approximately 12 inches.
How Often Should You Water a Astilbe?
Astilbe japonica requires watering every 3–4 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 3–4 days
Let soil partially dry between waterings
What Light Does the Astilbe Need?
Astilbe thrives in part shade to full shade. The optimal light range is 100–1,000 lux. Avoid placing Astilbe in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Part shade to full shade
100–1,000 lux
What Temperature and Humidity Does the Astilbe Prefer?
Astilbe japonica grows best at temperatures of 60–75°F. Astilbe prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
60–75°F
Humidity
50–70%
What Soil Mix Works Best for a Astilbe?
Rich, moist, well-draining soil with high organic content. Good drainage is essential for Astilbe to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Astilbe?
Feed Astilbe every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Astilbe?
Divide and replant every 3-4 years. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Astilbe?
Astilbe can be propagated through division of clumps, seeds. Similar propagation techniques also apply to chinese astilbe plant care, which shares the same genus.
Is the Astilbe Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Astilbe, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Astilbe?
Astilbe is susceptible to slugs, snails, spider mites. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Astilbe Need?
Astilbe grows outdoors in USDA Zone 4a – 8b. It survives winters down to planting zone 4a. Astilbe is native to Japan, and introduced in New York State.
Hardiness Zone
Zone 4a – 8b
Keep exploring plants
Astilbe is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Astilbe genus — compare its care with other Astilbe species on PlantoScan.
Astilbe is part of the Saxifragaceae plant family — browse all Saxifragaceae genera and species.
Astilbe copes with lower light than most plants — browse the full list of low-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Astilbe japonica (C.Morren & Decne.) A.Gray, family Saxifragaceae (first published in Amer. J. Sci. Arts 42: 39 (1841)) — World Flora Online record, IPNI name record, Wikidata.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Astilbe, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Photo: AI-generated illustration (labelled on the image).
- Hardiness zone: USDA Zone 4a – 8b, estimated from the plant's typical growing conditions.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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