types of thistle weeds
Public and private landowners are not required to control infestations of bull thistle that occur on their property in King County. Bull thistle is a Class C Noxious Weed in Washington, first listed in 1988. Because control is not required in the county, it is on the list of Non-Regulated Noxious Weeds for King County. For more information, see Noxious Weed Lists and Laws or visit the website of the Washington State Noxious Weed Control Board.