what is this?
By Jill2
United Kingdom 
I have a large plant growing on my allotment. It is at least 6ft. tall and looks like a giant thistle. It has a purple head and is prickly. The leaves are about 1ft. long and look a bit fleshy. Can anyone help?
28 Jul, 2008
Previous question
Possibly a cardoon?
28 Jul, 2008