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Achillea ptarmica 'Aunt Stientje'

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© RHS

Characteristics

Plant type

Herbaceous Perennial

Habit

Bushy

Resilience

Hardiness

old H4 (hardy)

Colour

Flower

Cream in Summer

Foliage

Dark Green in Autumn, 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 'Aunt Stientje'

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

'Aunt Stientje' is a perennial forming a spreading clump of erect stems with narrow dark green leaves, and clusters of creamy-white flowers

How to grow

Sunlight

  • Part shade

Aspect

  • North-facing, West-facing or East-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
  • Sand, Chalk or Loam

Propagation

Propagate by division in spring

Suggested planting locations and garden types

Cottage/Informal Garden, Flower borders and beds or Prairie Planting


How to care

Pruning

Cut back untidy foliage in spring

Pests

Can get aphids

Diseases

May suffer from powdery mildews