Knapweed

Centaurea atropurpurea

Knapweed - Centaurea atropurpurea

Common Name: Knapweed
Genus: Centaurea
Species: atropurpurea

Category: Perennials
Growth Rate: Fast growing
Features: Good for wildlife, Long flowering period

Hardiness: HardyHeight: 1.50 m (150 cm)
Sun/Shade: Full sunSpread: 0.75 m (75 cm)

Foliage Type: DeciduousFlower Colour: Red
Foliage Colour: GreenFlowering Period: June to October

Soil Type: Normal/Loam or Sandy/Light or Chalky/Alkaline
Soil Moisture: Dry, well drained or Moist, but well drained

A rarer form of knapweed which has large feathered foliage and tall upright stems that are topped with showy thistle-like flowers throughout summer. A native of the mountainous meadows in the Carpathians, it will thrive in most well drained soils as long as it gets lots of sun. Plant it with ornamental grasses for a wilder look or place it towards the back of a mixed or herbaceous border for long-lasting interest.

  • Garden care: Stake with bamboo canes or brushwood before the flowers appear. Deadhead regularly to prolong flowering. In autumn resist the temptation to remove the faded flowerheads as the subsequent seedheads are really attractive in winter. Lift and divide large clumps every three years in spring.


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