Blaine County Weed Control

Malia Leonard is the Outreach Coordinator for the Weed Department. If you would like to report a noxious weed sighting or have any weed-related questions, give her a call. The Weed Department hosts many educational and hands-on activities in the summer. To find out how to become involved, call 208-788-5516 or 208-720-8774.

The most detrimental noxious weeds in our county and the biggest threat to our fragile ecosystem are Spotted knapweed, Diffuse knapweed, and Dalmatian Toadflax. Unfortunately, these are also the costliest to control. Get to know these weeds and eradicate them on your property.

Blaine County has many of the 36 weeds declared noxious by the State of Idaho. By law, landowners must control noxious weeds on their property.  The worst in our county and the biggest threat to our fragile ecosystem are spotted knapweed and diffuse knapweed.   Get to know these weeds and eradicate them on your property.

You may also obtain your free copy of Idaho's Noxious Weeds by visiting idahoweedawareness.com. 

Spotted knapweed over winters as a rosette. Early spring growth (shown here) gives it a competitive edge over native plants. The stems elongate in June.

The pink or purple flowers of the spotted knapweed are similar to Russian knapweed or Canada thistle. However, the black-tipped bracts of the flower head distinguish spotted knapweed from other plants.

Diffuse knapweed generally has white flowers. Seed-bearing burs may cling to clothes and fur. 

Dalmatian toadflax grows up to 3 feet tall and is distinguished by yellow snapdragon-like flowers and heart shaped waxy leaves. This plant is found on roadsides, railroads and dry, rocky areas.

See more pictures of Idaho Noxious weeds on the Idaho One Plan web site.