Astilbe 'Rubin'

RHS Plant Profile

astilbe 'Rubin'

Bogs Herbaceous Perennial

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A tall, clump-forming perennial with dark stems to 90cm, bearing dark reddish-green, divided leaves and freely producing narrow, dense plumes of dark violet-pink, long-lasting flowers to 25cm long, above the foliage in early summer

Position

Partial shade

Soil Types

Clay, Loam

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.5-1 metres
Max Height: 0.5-1 metres

Growing Conditions

Clay Loam

Moisture: Moist but well–drained or Poorly–drained
pH: Acid or Alkaline or Neutral

Position

Partial shade

Aspect: East–facing or North–facing or West–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): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

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 or boggy soil in dappled shade, where the soil never dries out and remains moisture-retentive in summer. Drought intolerant, and may be scorched in direct sun. Good for waterside and woodland planting. See Astilbe cultivation

Propagation

Propagate by division in late winter to early spring; replant immediately or pot up and grow on under glass to plant out in late spring when plants are re-established

Suggested planting locations and garden types

Cottage and informal garden
Cut flowers
Flower borders and beds

Pruning

Flowering stems can be tidied and cut back when flowers fade, but can also be left for winter interest and wildlife habitat

Pests

May be susceptible to vine weevil

Diseases

May be susceptible to leaf spot weather damage and powdery mildews