Common knapweed or hardheads is a colourful meadow wild flower plant of the thistle family. Tight purple flowers, with lance shaped leaves. Forms dense clumps over time, ideal for sunnymeadows and hedge banks. A great bee plant, and a goldfinch magnet in the autumn.
Height: 30 - 60cm Prefers: Sun and well-drained soil
Flowers: June - September
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