Onopordum acanthium (Donkey Thistle)
Onopordum acanthium (Donkey Thistle)
250 (400)cm, Donkey Thistle is a giant biannual with showy silvery-bluish leaves up to 150cm in length. The tall inflorescence emerges from a dense basal leaf rosette and may reach more than 400cm in height in late spring to mid summer ! A very easy going and out of the ordinary plant for any rich, well drained soil in full sun. V-VIII.More Details »