Common Knapweed

Centaurea nigra

Also known as

Black knapweed, Lesser knapweed

Full Sun

Moderate watering

Frost Hardy

USDA zone

-18°C

Minimum temperature

Expected size

Height		Spread
1m	Max	50cm
50cm	Min	10cm

2 years to reach maturity

Flowering

spring
summer
autumn
winter

More images of Common Knapweed

Common Knapweed Overview

This is a perennial with lance-shaped or lanceolate leaves and single clusters of red-purple tubular flowers which bloom in the early summer.

Common problems with Common Knapweed

disease
Powdery Mildew

How to propagate Common Knapweed

Division

You can propagate by seeds or division in the autumn or spring.

Seed

Special features of Common Knapweed

Attracts butterflies

Attracts useful insects

Moths, hoverflies, bees, butterflies

Other uses of Common Knapweed

Waste land