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BogsHerbaceous Perennial

Astilbe 'Mainz' (_japonica_ hybrid)

astilbe 'Mainz'

A clump-forming perennial abiout 60cm high, with deep green, glossy divided leaves, and dense, reddish-purple plumes of flowers in summer

Synonyms

Astilbe 'Mainz'
Astilbe 'Erfurt'

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Ultimate height

0.5–1 metres

Time to ultimate height

2–5 years

Ultimate spread

0.5–1 metres

Clay

Loam

Moisture

Moist but well–drained, Poorly–drained

pH

Acid, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun
Partial shade

Aspect

South–facing or North–facing or West–facing or East–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: Accepted

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 spring

Suggested planting locations and garden types

Cottage and informal garden
City and courtyard gardens
Flower borders and beds

Pruning

Can cut back after flowering, or delay until spring as faded flower spikes can remain attractive in autumn and winter

Pests

May be susceptible to vine weevil

Diseases

May be susceptible to Powdery mildews and a leaf spot

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