Plant Base Online (beta)

botanical name:
Centaurea nigra
Centaurea nigra © Deeproot Plant Base
common name:  Common Knapweed, Lesser Knapweed
family:  Asteraceae
characteristics: perennial
height: 1.20m
width: 0.60m
growth rate: medium
growth habit: erect
leaf colour: grey-green
flower colour: purple
fruit colour: brown
stem/bark: green
main season: Summer
aspect: full sun, part shade
conditions: dry soil, moist soil, sandy soil, coastal
preferred soil pH: neutral-alkaline
minimum temp: -35°C
USDA zone: 4 to 8
Perennial wildflower of grasslands and meadows. Downy with branching stems and oval to lance-shaped, green to grey-green leaves, which are much narrower on the upper stems Reddish or pinkish purple flowerheads, sometimes with long-stalked ray florets, and overlapping, scale-like, brown bracts, forming a knobbly head that later encloses the bristly fruits. Flowers from June to September.
May vary in form locally.

Well drained soil in full sun or part shade.

By seed.

Wildflower gardens.

other notes:
British native. Widespread distribution and common on grassllands, roadsides, sand-dunes and sea cliffs. Less frequently seen than previously, due to modern farming styles.
Deeproot tree logo

You can also install Plant Base on your computer:

  • self contained application
  • more features
  • update and add records
  • larger and higher quality pictures
  • fast and efficient
  • always available, no connection needed
  • Windows, Mac and Android

details ...