Black Knapweed (Centaurea nigra) plug plants

Our Black Knapweed plug plants for sale are priced per individual plant. This product has a minimum quantity of 10 plug plants. For orders over 500 plug plants please contact us.

All our plants are native British wildflowers grown in Peat-free compost in our sustainable nursery.

Common name: Black Knapweed

Latin name: Centaurea nigra

Description: Black Knapweed (also known as Common Knapweed or Lesser Knapweed) is a perennial that produces thistle-like purple flowers. Black Knapweed is found throughout the British Isles except the northern most tip of Scotland. It prefers soils of low to moderate fertility and is found mostly in soils of pH 5 to 8. It is found in pasture, meadows, rock outcrops, wasteland, river banks, roadside verges, beside paths and in ungrazed limestone grassland.

Height: 40-70cm

Flowering time: June to September

Colour: Red to purple

Management: Black Knapweed generally needs little management. One cut back per year should be enough. It can be easily planted in herbaceous borders. The plant is an attractive nectar source for many butterflies, e.g. Small Skipper, Silver Spotted Skipper, Brimstone, Chalkhill Blue, Adonis Blue, Small Tortoiseshell, Peacock, Comma, Silver-washed Fritillary, Marbled White and Meadow Brown.

Kindly be aware that as autumn approaches, our wildflower plants might be delivered in a state where they appear to have passed their peak. We strive to inform you about this at the time of your order. It is common for native plants to exhibit leaf blotches or have dead/brown leaves during specific times of the year; this is entirely natural. We assure you that we meticulously inspect the root condition, ensuring their robust health. Once planted, the plug plant will respond accordingly.

Please understand that owing to the perishable nature of our plug plants, the usual right to cancel does not apply.