Giant Thistle Flower. While repellant to nibbling rabbits and deer the spiny spiky foliage also. 26062009 Eryngium giganteum Silver Ghost is smaller and more silvery white.
Because of its deep wide-spreading roots Canadian thistle is difficult to control. Its spherical blue blooms are arresting in the summer border but unlike some eye-catching flowers globe thistle plants are drought tolerant deer resistant and an important source of nectar for butterflies and bees. I was struck by the huge size of the plant that towered above me.
Onopordum acanthium cotton.
It is advisable to remove seed heads before they disintegrate as the thick long roots can make unwanted self-seeded plants difficult to remove. Globe thistle produces long lasting masses of globular spiked violet-blue flowers on solid tall 75-90 cm 30-36 stem. It is advisable to remove seed heads before they disintegrate as the thick long roots can make unwanted self-seeded plants difficult to remove. Onopordum acanthium cotton thistle flowers closeup selective focus.