Astilbe alba
Astilbe alba · Saxifragaceae
The gardener's calendar
Ideal time to plant astilbe alba: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous, finely cut and feathery
- Flowering
- May to July, white flowers in dense panicles
- Adult size
- 80 cm in height
- Growth
- Moderate to fast
- Hardiness
- Very hardy, down to -15 °C
- Origin
- East Asia, particularly Japan and China
- Family
- Saxifragaceae
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Same as rubra: moist, rich soil. Brighter white flowering.
The common mistake
Stashing it in a dry corner — contrary to popular belief, this one hates drought.
The pro's trick
Plant it near a water feature or at the edge of a pond for that romantic vibe and optimal growth.
Care
Regular and consistent watering
White astilbe appreciates constantly moist soil, especially during growth and flowering. Water deeply 2 to 3 times per week during dry periods, making sure not to let the soil dry out completely. In winter, reduce watering but don't let the soil become completely dry.
Partial shade ideal
Place white astilbe in partial shade or dappled shade, as it dislikes full sun which can scorch its delicate foliage and reduce flowering. An east or north-facing exposure is particularly favorable. It also tolerates partially shaded areas near large trees.
Rich and well-draining soil
Astilbe prefers fertile, slightly acidic to neutral soil, enriched with organic matter. Incorporate compost or peat at planting to improve moisture retention. A mulch at the base helps keep the soil cool and nourishes the plant gradually.
Moderate fertilization in spring
Apply a balanced fertilizer in spring when growth begins to support growth and flowering. A second light application before flowering can extend the blooming period. Avoid over-fertilizing, which would promote foliage at the expense of flowers.
Removal of spent flowers
Cut off the flower panicles once they've faded to encourage more abundant flowering and maintain a balanced shape. In autumn or late winter, cut the foliage back to ground level once it has completely died back. This plant requires no special formative pruning.
Prevention against powdery mildew and spider mites
In warm, dry conditions, astilbe can be affected by powdery mildew or spider mites. Maintain soil moisture and good air circulation to prevent these problems. Foliage that yellows or wilts abnormally may indicate insufficient watering or water stress.
Did you know?
White astilbe, native to the shaded forests of East Asia, was once highly prized by Victorian landscape gardeners who used it extensively in English-style gardens. Its name comes from the Greek 'a' (without) and 'stilbe' (shine), because unlike other flowers in its family, its flowers are subtle though beautiful in masses.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
Add this plant to my garden →Plants from the same family
- BergeniaBergenia crassifolia
- Tall False-buck's-beardAstilbe rubra
- Astilbe roseaAstilbe rosea
- Astilboides tabularisAstilboides tabularis
- Crevice alumrootHeuchera micrantha
- Heuchera brizoidesHeuchera brizoides
Tips generated and checked by Viridia — adapt them to your local climate.