Common Knapweed
Centaurea nigra
Photo: Julie Anne Workman · CC BY-SA 3.0 · Wikimedia Commons
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When it flowers
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Flowers Jun–Sep.
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Who it feeds
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How to grow it
Common Knapweed is a flower that loves a sunny spot. Happy in a pot or in the ground, it reaches around 60cm. It's easy and forgiving — a lovely plant to start with.