Plant Base Online (beta)

botanical name:
Onopordum acanthium
Onopordum acanthium © Deeproot Plant Base
common name:  Scotch thistle, cotton thistle
synonyms:  Onopordon acanthium
family:  Asteraceae
characteristics: annual/biennial
height: 3.00m
width: 1.00m
growth rate: fast
growth habit: spiky
leaf colour: silver
flower colour: lilac
main season: Summer
aspect: full sun, part shade
conditions: moist soil
preferred soil pH: neutral
minimum temp: -18°C
USDA zone: 7 to 9
Large and dramatic biennial. In the first year it makes a rosette of huge spiny, white felted, leaves. Produces a tall stiff flowering stem in the second year carrying the pale lilac thistle-like flowerheads. Often seeds itself freely.

Well drained, reasonably fertile, neutral to slightly alkaline soil in full sun.

From seed.

other notes:
Found in the wild from Western Europe to Western and Central Asia.
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 ...