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Aruncus dioicus (m) AGM

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© RHS 2002

Characteristics

Plant type

Bog or Herbaceous Perennial

Habit

Clump-forming

Resilience

Hardiness

H7 (very hardy)

Colour

Flower

Cream in Summer

Foliage

Pale Green in Autumn, Spring and Summer

Size

Ultimate height

1.5-2.5 metres

Ultimate spread

0.5-1 metres

Time to ultimate height

2-5 years


Preferred common name

goat's beard

Family

Rosaceae


Aruncus are clump-forming rhizomatous perennials with pinnately divided leaves and very small creamy-white flowers, usually unisexual, in large terminal panicles

A. dioicus is a vigorous herbaceous perennial forming large clumps to 2m in height, with broad, light green, bipinnate leaves and arching plumes of tiny creamy-white male flowers

Other common names

  • goat's beard

Synonym(s)

  • Aruncus plumosus
  • Aruncus sylvestris

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

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

Cultivation

Grow in moist, fertile soil in full sun or partial shade.

Soil

  • Poorly-drained
  • Acid, Alkaline or Neutral
  • Clay or Loam

Propagation

Propagate by seed sown in spring or autumn or by division in spring

Suggested planting locations and garden types

Cottage/Informal Garden, Flower borders and beds or Wildflower meadow


How to care

Pruning

Cut back after flowering

Pests

Sawflies may cause defoliation

Diseases

Generally disease free