About
Achillea 'Petra' is a perennial that forms clumps reaching up to 60 cm in height, featuring finely divided foliage that is greyish-green in color. From summer through autumn, it produces dense clusters of small dark red flowers that have distinctive white centers. This variety is notable for its deep red blooms, which maintain their vibrant hue over time without fading.
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
- Full sun
- Soil type
- Chalk, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Well-drained
- Aspect
- West-facing, East-facing, South-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H7
Plant details
- Plant type
- Herbaceous Perennial
- Habit
- Clump forming
- Foliage
- Deciduous
- Height
- 0.5-1 metres
- Spread
- 0.1-0.5 metres
- Time to full height
- 2-5 years
- Suggested uses
- City and courtyard gardens, Gravel garden, Coastal, Cottage and informal garden, Patio and container plants
Care notes
- Cultivation
- Prefers an open sunny position in well-drained soil
- Pruning
- Cut back untidy foliage in spring; cutting back flowerheads may encourage repeat flowering during summer
- Propagation
- Propagate by division in spring
- Pest resistance
- May be susceptible to aphids
- Disease resistance
- May be susceptible to powdery mildews