Noxious Weed Control Board

Washington State

Noxious Weed Control Board
Identify a Weed

We found 3 weeds that match your search

Search again
Japanese Knotweed

Japanese Knotweed

Polygonum cuspidatum
Bohemian Knotweed

Bohemian Knotweed

Polygonum x bohemicum
Giant Knotweed

Giant Knotweed

Polygonum sachalinense

Washington State Noxious Weed Control Board

1111 Washington Street SE
Olympia WA 98504

P.O Box 42560
Olympia, WA 98504-2560

noxiousweeds@agr.wa.gov

Learn More

Noxious Weeds Damage Our Resources