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Centaurea carniolica (Knapweed)
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1 hour care
per year
per year
0.4m
Max height
Max height
0.3m
Max spread
Max spread
1-2 years
To maturity
To maturity
Plant details
Botanical name
Centaurea carniolica
Other names
Knapweed, Centaurea nigrescens, Centaurea nigrescens var. ramosa, Tyrop knapweed, Short-fringed knapweed
Genus
Centaurea Centaurea
Species
C. carniolica - C. carniolica is an upright, branched, herbaceous perennial with ovate to lance-shaped, sometimes lobed and toothed, grey-green leaves and thistle-like, purple-pink to purple flowers from late spring into summer.
Centaurea carniolica is: Deciduous
Habit
Cushion or Mound Forming
Flower
Purple, Purple-pink in Spring; Purple, Purple-pink 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 and to prevent unwanted seedlings.
Propagation methods
Division, Seed
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Where to grow
Centaurea carniolica (Knapweed) will reach a height of 0.4m and a spread of 0.3m after 1-2 years.
Suggested uses
Coastal, Flower Arranging, Beds and borders, Containers, Wildflower, Wildlife
Cultivation
Best in well-drained soil in full sun. Tolerates dry, alkaline soil and neglect. Self-seeds readily so may become invasive.
Soil type
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Partial Shade, Full Sun
Aspect
North, South, East, West
Exposure
Exposed, Sheltered
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 carniolica
Other names
Knapweed, Centaurea nigrescens, Centaurea nigrescens var. ramosa, Tyrop knapweed, Short-fringed knapweed
Genus
Centaurea Centaurea
Species
C. carniolica - C. carniolica is an upright, branched, herbaceous perennial with ovate to lance-shaped, sometimes lobed and toothed, grey-green leaves and thistle-like, purple-pink to purple flowers from late spring into summer.
Foliage
Deciduous
Habit
Cushion or Mound Forming
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Colour
Flower
Purple, Purple-pink in Spring; Purple, Purple-pink 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 and to prevent unwanted seedlings.
Propagation methods
Division, Seed
Monthly care advice
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Where to grow
Centaurea carniolica (Knapweed) will reach a height of 0.4m and a spread of 0.3m after 1-2 years.
Suggested uses
Coastal, Flower Arranging, Beds and borders, Containers, Wildflower, Wildlife
Cultivation
Best in well-drained soil in full sun. Tolerates dry, alkaline soil and neglect. Self-seeds readily so may become invasive.
Soil type
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Partial Shade, Full Sun
Aspect
North, South, East, West
Exposure
Exposed, Sheltered
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, Zone 4, Zone 3
In order to add a note on this plant, please add this plant to your plant lists.
| This plant likes... | Garden match | |
| Soil types: | Chalky, Clay, Loamy, Sandy (will tolerate most soil types) | Tell us... |
| Soil drainage: | Moist but well-drained, Well-drained | Tell us... |
| Soil pH: | Acid, Alkaline, Neutral | Tell us... |
| Light: | Partial Shade, Full Sun | Tell us... |
| Aspect: | North, South, East, West | Tell us... |
| Exposure: | Exposed, Sheltered | Tell us... |
| Hardiness: | Hardy (H4) | Tell us... |
ARTICLES WITH THIS PLANT
By Bumblebee Conservation Trust. Wildflowers have become scarce in the countryside because we've lost many traditional habitats like hedgerows, hay meadows and chalk grassland. Wherever you… read more
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