Centaurea 'John Coutts'
knapweed 'John Coutts'
'John Coutts' is a vigorous herbaceous perennial, with jagged lobed leaves white-felted beneath, and showy purplish-pink flower-heads 6cm across in summer and often into early autumn
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Size
Ultimate height
0.1–0.5 metresTime to ultimate height
2–5 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Well–drainedpH
Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green Grey Silver | |||
|---|---|---|---|---|
| Summer | Pink | Green Grey Silver | ||
| Autumn | Pink | Green Grey Silver | ||
| Winter |
Position
- Full sun
Aspect
South–facing or West–facing
Exposure
Exposed Hardiness
H6Botanical details
- Family
- Asteraceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Bushy
- 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
Grow in well-drained soil in full sun. Attractive to bees and butterflies
Propagation
Propagate by seed in containers in a cold frame in spring. Propagate by division in spring or autumn
Suggested planting locations and garden types
- Coastal
- Wildlife gardens
- City and courtyard gardens
- Cottage and informal garden
- Flower borders and beds
Pruning
No pruning required
Pests
Generally pest-free
Diseases
Powdery mildews may occur
Get involved
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