About
Achillea ptarmica The Pearl Group consists of seed-raised plants that exhibit variability. They produce semi-double to fully double white blooms on upright, leafy stems, reaching heights of up to 90 cm during the summer months.
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
- North-facing, East-facing, West-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H7
Plant details
- Plant type
- Herbaceous Perennial
- Habit
- Bushy
- Foliage
- Deciduous
- Height
- 0.5-1 metres
- Spread
- 0.5-1 metres
- Time to full height
- 2-5 years
- Suggested uses
- City and courtyard gardens, Cottage and informal garden, Prairie planting, 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