About
Achillea ptarmica (The Pearl Group) 'The Pearl' is a robust perennial that develops a dense, spreading mound of finely dissected foliage. Its dark green leaves provide a rich backdrop for the pure white, double flower heads that emerge in abundance.
About the genus
Achillea consists of perennial plants that can grow in a mat-forming or upright habit. These mostly herbaceous species feature leaves that may be aromatic, either pinnately divided or simple with serrated edges. The plants produce flattened clusters of small, daisy-like flower heads.
Growing conditions
- Sunlight
- Partial shade
- Soil type
- Chalk, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- East-facing, North-facing, West-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H7
Plant details
- Plant type
- Herbaceous Perennial
- Habit
- Spreading branched
- Foliage
- Deciduous
- Height
- 0.5-1 metres
- Spread
- 0.5-1 metres
- Time to full height
- 2-5 years
- Suggested uses
- Prairie planting, Coastal, Cottage and informal garden, Gravel garden, Wildlife gardens
Care notes
- Cultivation
- Requires a more moist soil than most other achilleas but not waterlogged, does best in partial shade
- Pruning
- Cut back untidy foliage in spring
- Propagation
- Propagate by division in spring
- Pest resistance
- May be susceptible to aphids
- Disease resistance
- May be susceptible to powdery mildews