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Beginner skill rating |
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0.5m max. spread |
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1m max. height |
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2-5 years to maturity |
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2 hours care per year |
Botanical name: Centaurea scabiosa
Other names: Greater knapweed, Black top
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Genus: Centaurea
Species: C. scabiosa - C. scabiosa has an upright habit with red-purple flowers heads and enlarged outer florets.
Centaurea scabiosa is: Deciduous
Flower: Purple, Red in Summer
Foliage: Green in Summer
Habit: Clump-forming, Open branches, Spreading
Plant with: Ballota pseudodictamnus (False dittany), Ballota acetabulosa (Greek horehound)
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Specific diseases: Powdery mildew
Pruning: No pruning required. REGISTER to read more...
Propagation methods: Seed. REGISTER to read more...
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Centaurea scabiosa (Greater knapweed) will reach a height of 1m and a spread of 0.5m after 2-5 years.
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Suggested uses: Bees (attract & feed bees), Low Maintenance, Wildflower, Wildlife
Cultivation: Sow seeds in thier final position in early autumn or early spring. Thin out seedlings to 25 apart. Prefers a well-drained, fertile soil in sun. Tolerant of dry, alkaline soils and established plants are tolerant of considerable neglect. Self-seeding and
| This plant likes... | Garden match | |
| Soil types: | 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 | |
| Hardiness: | Hardy (H4) | |
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Comment from
Greater knapweed is an attractive addition to the flower border and will grow much larger in the garden than in the wild. Like its close relatives in the huge daisy family, this species is very valuable to bees. It is also a magnet for many species of butterfly. Among them is the marbled white, which may occasionally venture into gardens near wild grassland.
We list 11 suppliers who tell us they sell Centaurea scabiosa (Greater knapweed). In order to see the list you'll need to either register or log in as a full member.
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"Just had a year's subscription from garden designer Charlotte Rowe. Very impressed ... will get out into the garden this week!"
Kate (Charlotte Rowe's client), Amersham, Buckinghamshire
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