Class B Weeds

These species are established in some regions of Washington, but are of limited distribution or not present in other regions of the state. Because of differences in distribution, treatment of Class B weeds varies between regions of the state. In regions where a Class B is unrecorded or of limited distribution, prevention of seed production is required.

In these areas, the weed is a "Class B designate," meaning it is designated for control by state law. In regions where a Class B species is already abundant or widespread, control is a local option. In these areas the weed is a "Class B non-designate," with containment, gradual reduction, and prevention of further spread being the chief goals

Washington State Noxious Weed List - Class B Weeds