Skip to main content

Smooth cordgrass identification and control: Spartina alterniflora

Smooth cordgrass identification and control

Spartina alterniflora

willapa bay

This Class A noxious weed is found in several Washington counties but has not been observed in King County. Control is required throughout Washington State including King County. For more information on noxious weed regulations and definitions, see Noxious weed lists and laws.

Additional information on smooth cordgrass

What to do if you find this plant in King County, Washington

Please notify us if you see smooth cordgrass growing in King County. Our program staff can provide the property owner or appropriate public agency with site-specific advice on how best to remove it. Also, because smooth cordgrass is not established in King County, we have an opportunity to stop it from spreading if we act quickly. We map all known locations of regulated noxious weeds such as smooth cordgrass in order to help us and others locate new infestations in time to control them.

Smooth cordgrass photos

smooth cordgrass
smooth cordgrass
smooth cordgrass
smooth cordgrass

Report smooth cordgrass in King County, Washington

Locate smooth cordgrass in King County, Washington

Related information

Related agencies

Program offices are located at 201 S. Jackson St., Suite 600, Seattle, WA 98104. To contact staff, see the Noxious Weed Control Program Directory, send an email, or call 206-477-WEED (206-477-9333).