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Common Knapweed Plants (Centaurea nigra)
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Common Knapweed Plants (Centaurea nigra)

Common knapweed or hardheads is a colourful meadow wildflower plant of the thistle family. Tight purple flowers, with lance-shaped leaves. Forms dense clumps over time, ideal for sunny meadows and hedgebanks. A great bee plant, and a goldfinch magnet in the autumn.

  • Height: 30 - 60cm
  • Requires: Sun and well-drained soil
  • Flowers: June - September