skip to main content

Noxious weeds

King County, Washington

To offer a suggestion or report an error on the King County Noxious Weeds website, please contact Sasha Shaw, education specialist.

Field bindweed
Convolvulus arvensis
field bindweed plant

Legal status in King County, Washington

Field bindweed is a Class C noxious weed on the Washington State Noxious Weed List, first listed before 1988. In King County, it is on the non-regulated noxious weed list. Property owners are not required to control this species.

Hedge bindweed (Convolvulus sepium or Calystegia sepium), also known as morning glory, is a closely related and widespread invasive species. Hedge bindweed is not on the Washinton State Weed List, but it is on the King County Weeds of Concern List due to its invasiveness, especially in urban greenspaces, gardens and backyards. It can also be a pest in berry fields and other crops, but it is more common along hedgerows and fences.  For photos and distribution information for hedge bindweed, please see the UW Burke Museum website.

Additional information on field bindweed

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

Because field bindweed is so widespread, property owners in King County are not required to control it and we are not generally tracking infestations. We can provide advice on how to control field bindweed, but there is generally no legal requirement to do so.

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).