Centaurea montana 'Amethyst in Snow'
perennial cornflower 'Amethyst in Snow'
A spreading, herbaceous perennial with grey-green foliage covered in silvery hairs. The thistle-like flowers, white with purple centres, open from scaly buds in late spring and early summer
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Size
Ultimate height
0.1–0.5 metresTime to ultimate height
2–5 yearsUltimate spread
0.5–1 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Purple White | Green Grey Silver | ||
|---|---|---|---|---|
| Summer | Purple White | Green Grey Silver | ||
| Autumn | Green Grey Silver | |||
| Winter |
Position
- Full sun
- Partial shade
Aspect
South–facing or North–facing or West–facing or East–facing
Exposure
Exposed or Sheltered Hardiness
H7Botanical details
- Family
- Asteraceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Matforming
- Genus
Centaurea may be annuals, perennials or subshrubs, with simple or pinnately lobed leaves and showy thistle-like flowers-heads, often with enlarged outer florets
- Name status
Accepted
How to grow
Cultivation
Best grown in moist but well-drained soil in sun or partial shade. May need staking
Propagation
Propagate by division in spring or autumn
Suggested planting locations and garden types
- Coastal
- Cottage and informal garden
- Patio and container plants
- Prairie planting
- Wildlife gardens
- Cut flowers
- Flower borders and beds
Pruning
Deadhead regularly to prolong flowering, and cut back in autumn
Pests
Generally pest-free
Diseases
May be affected by powdery mildews
Get involved
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.