Scotch thistle (Onopordum acanthium) is a biennial native to Eurasia. It was introduced into the U.S. as an ornamental and as ...

Scotch thistle is commonly found in pastures, and also in orchards, lawns, waste areas and crops. As a vegetative rosette, it can tolerate mowing. However stem elongation ("bolting") occurs when the ...

New plants re-establish from these roots in spring ... Find out more information about the biology and control of Californian thistle. Scotch thistle is the most common thistle species in New Zealand ...

Landowners in southern Rio Arriba, Santa Fe and Los Alamos counties may be eligible for financial assistance to deal with invasive or noxious weeds including Scotch thistle, chicory and Russian olive.