Noxious Weed Control Board

Washington State

Noxious Weed Control Board
Identify a Weed

We found 4 weeds that match your search

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Himalayan Knotweed

Himalayan Knotweed

Persicaria wallichii
Bohemian Knotweed

Bohemian Knotweed

Polygonum x bohemicum
Giant Knotweed

Giant Knotweed

Polygonum sachalinense
Japanese Knotweed

Japanese Knotweed

Polygonum cuspidatum

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

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Noxious Weeds Damage Our Resources