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Astilbe glaberrima var. saxatilis AGM

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© RHS 2002

Characteristics

Plant type

Bog or Herbaceous Perennial

Habit

Clump-forming

Resilience

Hardiness

H5 (hardy - cold winter)

Colour

Flower

Pink and White in Summer

Foliage

Green in Autumn, Spring and Summer

Size

Ultimate height

0.1-0.5 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

2-5 years


Preferred common name

smooth rock astilbe

Family

Saxifragaceae


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

A. glaberrima var. saxatilis is a dwarf herbaceous perennial to 15cm, with glossy bronze-green, deeply divided leaves and short sprays of pink-tinged white flowers

Synonym(s)

  • Astilbe glaberrima minor saxosa
  • Astilbe glaberrima saxosa
  • Astilbe glaberrima × 'Saxosa'
  • Astilbe japonica 'Saxosa'
  • Astilbe 'Saxosa'

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

  • South-facing, West-facing or East-facing
  • Exposed or Sheltered

Cultivation

Grow in moist, fertile, humus-rich soil in full sun or grow in partial shade where soil is likely to dry out in the summer. Plants must be divided every three to four years to maintain vigour.

Soil

  • Poorly-drained or Moist but well-drained
  • Neutral, Acid or Alkaline
  • Loam

Propagation

Propagate by division in late winter or early spring, pot divisions under glass and plant out in late spring.

Suggested planting locations and garden types

Cottage/Informal Garden, Flower borders and beds or Rock Garden


How to care

Pruning

Cut back after flowering

Pests

Generally pest free

Diseases

Powdery mildews may be troublesome