Imposing, distinctly grey in appearance.
As specimen plants but, because of their useful grey colour, also in borders. Full sun is essential for vigorous growth.
The cotton thistle will grow in pure sand, but will then remain smaller. In over-rich soil the grey colour will be less attractive.
Sow in early summer, in a shady-bed.
Prick out once and transfer to their permanentin early autumn. The plants will also themselves.
Onopordum bracteatum syn Onopordum arabicum: Height to 2.5 m, elliptical, irregularly incised, spiny, short-stalked or sessile; they are entirely covered in grey felt; the are winged and thorny. Purple flower-heads. To prevent the plants themselves too widely, it is advisable to remove the .