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BogsHerbaceous Perennial

Astilbe biternata

false goat's beard

A clump-forming herbaceous perennial to 1.8m high, with large, lobed and divided mid-green leaves with toothed margins. Produces tall, slender branching spikes of creamy white flowers in mid to late summer

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Ultimate height

1.5–2.5 metres

Time to ultimate height

2–5 years

Ultimate spread

1–1.5 metres

Loam

Moisture

Moist but well–drained, Poorly–drained

pH

Acid, Neutral, Alkaline

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Partial shade

Aspect

East–facing or West–facing or North–facing

Exposure

Sheltered

Hardiness
Hardiness ratings
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H1a: under glass all year (>15C)
H1b: can be grown outside in the summer (10 - 15)
H1c: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20)

Botanical details

Family: Saxifragaceae
Native to GB / Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: Astilbe are rhizomatous herbaceous perennials with attractive, usually ternately divided leaves and erect plume-like panicles of tiny white, pink or purple flowers in summer. The old, brown flower-heads remain attractive in autumn
Name status: Correct

How to grow

Cultivation

Grow in moist but well-drained or boggy soil in dappled shade, or in indirect sun where the soil remains moisture-retentive in summer. Drought intolerant, may be damaged in hot sun. Good for waterside planting. See Astilbe cultivation

Propagation

Propagate by division in winter or early spring; replant immediately or pot up to plant out in spring when re-established

Suggested planting locations and garden types

Cottage and informal garden
Flower borders and beds

Pruning

Flowering stems may be cut back when flowers fade, or left standing for winter interest

Pests

May be susceptible to vine weevil

Diseases

May be susceptible to leaf spot and Powdery mildews

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