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Achillea ptarmica (The Pearl Group) 'The Pearl' (clonal) (d)

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© RHS

Characteristics

Plant type

Herbaceous Perennial

Habit

Spreading / Branched

Toxicity

Resilience

Hardiness

old H4 (hardy)

Colour

Flower

White in Summer

Foliage

Dark Green in Spring and Summer

Size

Ultimate height

0.5-1 metres

Ultimate spread

0.5-1 metres

Time to ultimate height

2-5 years


Preferred common name

sneezewort 'The Pearl'

Family

Asteraceae


Achillea can be mat-forming or upright perennials, mostly herbaceous, with sometimes aromatic, pinnately divided or simple and toothed leaves and flattened clusters of small, daisy-like flower-heads

'The Pearl' is a vigorous perennial forming a spreading clump, with narrow dark green leaves and pure white, double flower-heads

Synonym(s)

  • Achillea 'The Pearl'

How to grow

Sunlight

  • Part shade

Aspect

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

Cultivation

Requires a more moist soil than most other achilleas but not waterlogged, does best in partial shade

Soil

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

Propagation

Propagate by division in spring

Suggested planting locations and garden types

Flower borders and beds, Cut Flowers, Gravel Garden, Coastal, Prairie Planting, Cottage/Informal Garden or Wildlife Gardens


How to care

Pruning

Cut back untidy foliage in spring

Pests

Can get aphids

Diseases

May suffer from powdery mildews