A Class C noxious weed in Washington State, yellow toadflax thrives predominately along roadsides, trails, railroads and open fields. It is occasionally found in gardens and landscapes. Its yellow flowers resemble that of a snapdragon, and are very similar to the flowers of Dalmatian toadflax. The leaves of yellow toadflax are small, narrow and linear, and the overall plant is seldom over 8 inches tall. Control of yellow toadflax in King County is recommended but not required. For more information on noxious weed regulations and definitions, see Noxious weed lists and laws.

Additional information on yellow toadflax

• Washington State Noxious Weed Control Board (external link)

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

Because yellow toadflax 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 yellow toadflax, but there is generally no legal requirement to do so.

Yellow toadflax photo

Related information

• Agriculture in King County, Washington
• Northwest yard and garden
• Animals, plants and habitat

Related agencies

• Dept. of Natural Resources and Parks
• Water and Land Resources Division

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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).