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Knapweed, Common (Centaurea nigra) Seeds
Produces a deep maroon flower head crowned with thistle-like florets of pink and purple, with dashes of a deep reddish-black. Don’t let its prickly appearance fool you- it’s an exceptionally hardy plant, but it has a softer side as a favourite of butterflies and bees!
- Type: Perennial
- Height: 30-60cm
- Flowers: June-September
- Best Sown: Autumn or Spring
- Soil Requirement: Well-drained
- Light Requirement: Full sun and partial shade
- Natural Habitat: Grasslands, forest verges
- Also known as: Bell Weed, Hardhead, Tassel
- Seeds per gram: 500
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Boston Seeds is an independent seed merchant founded in 2002 by Andrew Wallis, after 25 years working for some of Europe’s leading seed houses. Find out more about Boston Seeds.
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