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Invasive Weeds

Invasive weeds are not just non-native or undesirable weeds. They take over at the expense of the existing environment, reducing forage for livestock and wildlife.

Valley County residents must monitor and maintain their properties against invasive weeds.

Did you know you can see where weeds have been identified in Valley County? Check out the Valley County Noxious Weed Portal.

Seventeen (17) noxious weeds have been identified in Valley County. Learn more about each weed.

The top weeds in Valley County

  • Leafy Spurge
  • Rush Skeleton
  • Spotted Knapweed
  • Eurasian Watermilfoil
  • Canada Thistle
  • Oxeye Daisy
  • Yellow Toadflax
  • Hounds Tongue
  • Orange Hawkweed

Questions about weeds?

Contact Valley County Noxious Weed Control. It has resources ranging from help with identification and control methods to loaner spray equipment and cost-share programs.

Weeds to identify?

More Help


University of Idaho Extension, Valley County

Mailing Address:
PO Box 510
110 West Pine Street
Cascade, ID 83611

Phone: 208-382-7190



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UI Extension, Valley County