giant knapweed
Also known as: great-headed centaury
A large, clump-forming perennial with simple or lobed leaves and yellow flower-heads 5cm across opening in summer from brown buds
Scientific classification
- Species
- giant knapweed (Centaurea macrocephala)
- Genus
- Centaurea
- Family
- Asteraceae
- Information to be completed
- Toxicity
- Herbaceous Perennial
- Plant type
- 1-1.5 metres
- Height
- 0.1-0.5 metres
- Spread
- Deciduous
- Foliage
- Clump forming
- Habit
- Spring · Summer · Autumn
- Season of interest
- Full sun · Partial shade
- Sunlight
- Information to be completed
- Ideal temperature
giant knapweed pictures
Distribution of giant knapweed
Distribution map
Caucasus
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Culture
Information to be completed
Toxicity
Information to be completed
Quick identification of giant knapweed
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giant knapweed care guide
- Moderate regular watering, allowing brief slight drying between soakings
- Watering
- Full sun · Partial shade
- Sunlight
- Information to be completed
- Ideal temperature
Watering
Moderate regular watering, allowing brief slight drying between soakings
Fertilizing
FertilizingBalanced perennial feed every four weeks from spring through summer
Pruning
PruningDeadhead regularly to prolong flowering
Propagation
PropagationPropagate by seed sown in pots in a cold frame in spring or propagate by division in spring or autumn
Growing
GrowingBest grown in moist but well-drained soil in sun or partial shade
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Common pests and diseases
Diseases
May be affected by powdery mildews
Pests
Generally pest-free
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