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Centaurea cheiranthifolia (Yellow knapweed)
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1 hour care
per year
per year
0.5m
Max height
Max height
0.5m
Max spread
Max spread
2-5 years
To maturity
To maturity
Plant details
Botanical name
Centaurea cheiranthifolia
Other names
Cyanus cheiranthifolius, Yellow knapweed, Yellow perennial cornflower
Genus
Centaurea Centaurea
Species
C. cheiranthifolia - C. cheiranthifolia is an upright, clump-forming, herbaceous perennial with broadly lance-shaped, hairy, grey-green leaves and, in summer, slender, erect stems bearing large, creamy-white to pale yellow flower heads with purple stamens.
Centaurea cheiranthifolia is: Deciduous
Habit
Clump-forming, Erect flower stem
Flower
Cream in Summer
Foliage
Grey-green in Spring; Grey-green in Summer; Grey-green in Autumn
How to care
Watch out for
Pests
Generally pest free
Powdery mildew Powdery mildew
General care
Pruning
Deadhead to prolong the flowering season. Cut back after flowering to promote the production of new leaves.
Propagation methods
Division, Seed
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Where to grow
Centaurea cheiranthifolia (Yellow knapweed) will reach a height of 0.5m and a spread of 0.5m after 2-5 years.
Suggested uses
Wildlife, Beds and borders, City, Coastal, Cottage/Informal, Flower Arranging, Wildflower
Cultivation
Grow in well-drained, neutral to alkaline soil in sun.
Soil type
Loamy, Sandy
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Alkaline, Neutral
Light
Full Sun
Aspect
South, West
Exposure
Exposed
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
Companion plants
We do not currently have companion plants added for this plant.
Botanical name
Centaurea cheiranthifolia
Other names
Cyanus cheiranthifolius, Yellow knapweed, Yellow perennial cornflower
Genus
Centaurea Centaurea
Species
C. cheiranthifolia - C. cheiranthifolia is an upright, clump-forming, herbaceous perennial with broadly lance-shaped, hairy, grey-green leaves and, in summer, slender, erect stems bearing large, creamy-white to pale yellow flower heads with purple stamens.
Foliage
Deciduous
Habit
Clump-forming, Erect flower stem
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Colour
Flower
Cream in Summer
Foliage
Grey-green in Spring; Grey-green in Summer; Grey-green in Autumn
How to care
Watch out for
Pests
Generally pest free
Specific diseases
General care
Pruning
Deadhead to prolong the flowering season. Cut back after flowering to promote the production of new leaves.
Propagation methods
Division, Seed
Monthly care advice
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Where to grow
Centaurea cheiranthifolia (Yellow knapweed) will reach a height of 0.5m and a spread of 0.5m after 2-5 years.
Suggested uses
Wildlife, Beds and borders, City, Coastal, Cottage/Informal, Flower Arranging, Wildflower
Cultivation
Grow in well-drained, neutral to alkaline soil in sun.
Soil type
Loamy, Sandy
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Alkaline, Neutral
Light
Full Sun
Aspect
South, West
Exposure
Exposed
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
USDA zones
Zone 9, Zone 8, Zone 7, Zone 6, Zone 5
In order to add a note on this plant, please add this plant to your plant lists.
| This plant likes... | Garden match | |
| Soil types: | Loamy, Sandy | Tell us... |
| Soil drainage: | Moist but well-drained, Well-drained | Tell us... |
| Soil pH: | Alkaline, Neutral | Tell us... |
| Light: | Full Sun | Tell us... |
| Aspect: | South, West | Tell us... |
| Exposure: | Exposed | Tell us... |
| Hardiness: | Hardy (H4) | Tell us... |
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