Washington State

Noxious Weed Control Board

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Identify a Weed

Not sure what weed you have? Use our identification tool to search our database of noxious weeds.

Quarantine List

Is the weed you have a noxious weed? Learn more about control requirements here!

Safe Disposal

So you have a noxious weed on your property? Click here for here resources and assistance in controlling it!

Publications

Learn more about identifying noxious weeds, non-invasive gardening alternatives, safe disposal options, protecting pollinators, and more!

Noxious weeds are invasive, non-native plants that threaten agricultural crops, local ecosystems or fish & wildlife habitats.

The term ‘noxious weeds’ includes non-native grasses, flowering plants, shrubs and trees. It also includes aquatic plants that invade wetlands, rivers, lakes and shorelines.

About half of all invasive, noxious weeds are escapees from gardens; the rest are plants accidentally introduced to Washington through human travel and trade.

Learn More about WA's Noxious Weeds Laws

Noxious Weeds Affect Us All

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Noxious weeds take over native plant communities and change the habitat upon which wildlife depend for food and shelter. Some even form physical barriers that restrict wildlife movement.

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Protect Our Wildlife

Noxious weeds can reduce fishing opportunity for anglers as they can make habitat less hospitable for fish and can reduce the oxygen level in the water, which can suffocate fish.

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Some noxious weeds are toxic to humans. Contact with giant hogweed's sap can leave painful, third-degree burns.

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Noxious weeds crowd out desirable forage for cattle, sheep, goats, horses, or other livestock. Some noxious weeds, such as yellow starthistle, also have spines that can injure livestock.

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Washington State

Noxious Weed Control Board

We all share responsibility for protecting Washington State from noxious weeds. This site can help you learn how to do your part.

Identify a Weed

Quarantine List

Safe Disposal

Publications

Noxious weeds are invasive, non-native plants that threaten agricultural crops, local ecosystems or fish & wildlife habitats.

Noxious Weeds Affect Us All

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Protect Our Wildlife

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Washington State Noxious Weed Control Board

Learn More