Bull Thistle – Invasive Weed

“Invasive Weeds” are non-native plants that crowd our native and desirable species important to Warm Springs People and Wildlife.

Bull Thistle is a biennial herbaceous plant between 3-7 feet tall with one upright branched stem.  It blooms in its second year.  Flowers are purple or rarely white, blooming July through September.  Each leaf lobe has a spined tip.  Bull Thistle reproduces by seed only.  Jand pull and dispose of flowering plants in trash to prevent seed spread.

. To learn more about controlling invasive weeds like Bull Thistle – you can contact these local resources:  Suzie Miller at the Warm Springs Branch of Natural Resources (541-553-2007, [email protected]), Terry Stradley at the Warm Springs Branch of Natural Resources (541-553-2009, [email protected]), Todd Shockney at the Jefferson County Noxious Weed Department (541-475-4459 ext. 5325), Scott Duggan, Oregon State University Warm Springs Extension (541-553-3238,  [email protected])