Common Knapweed

Common Knapweed Seeds

Centaurea nigra
Black knapweed, hardhead, iron knobs, black centaury, loggerheads, bell weed and Spanish buttons.

Common knapweed, also known as 'black knapweed', is a thistle-like plant that can be found on all kinds of grasslands, from roadside verges to woodland rides, clifftops to lawns. It is in bloom from June to September and is a huge favourite of all kinds of butterflies, including common blues, marbled whites and meadow browns, and is sometimes covered in these species.

Direct sow into scarified grass or bare soil. Cut back in autumn. Readily self-seeds. 

Contents: Approximately 280 seeds

Average height: 75cm
Aspect: Sun or semi-shade
Soil type: loam, chalk, sand, clay
Sowing time: spring or autumn
Flowering period: June-September
Colour: purple

Prefers a well-drained fertile soil in a sunny position. Tolerant of dry, alkaline soils and established plants are tolerant of considerable neglect. 

Our packaging is made from FSC recycled cardboard and environmentally friendly inks. The seed bags are waxed paper or compostable starch to keep seeds in the best condition during storage.