Contact Information


Teton County Courthouse
150 Courthouse Drive - Room 107
Driggs, ID   83422

150 Courthouse Drive- Room 107
Driggs, ID   83422

208-821-0984 (phone)
208-354-8410 (fax)

Mon-Thurs 7:00-5:00 Please call ahead to guarantee service


Department Home

Musk Thistle blooming season is here. Musk Thistle (Carduus nutans) is a biennial, or sometimes annual.  Here are a few fun facts:
  • Mowing reduces seed production, but usually needs to be repeated every week for the blooming period (4-7 weeks). 
  • Flower heads cut 4 or more days after flowers first open can produce viable seeds and should be removed- before then you can leave them lay. 
  • When digging/pulling thistles remove 2-4" below root crown. 
  • Healthy competitive vegetation with a closed canopy (like tall grass, not mowed) can significantly reduce thistle seed germination.
  • Biocontrol insects have been released and are widely established in the valley, but have not been able to reduce seed production by enough to be effective. 
  • Musk Thistle does especially well in disturbed areas with increased nitrogen.

Check out our ID and Control Guide for more info. 



Please note that we are unable to maintain regular office hours as we treat weeds throughout the County. Call ahead or email to schedule an appointment to guarantee service.
Idaho State Statute requires noxious weeds to be controlled. “Noxious” is a legal designation; these species have been determined by the state of Idaho to pose a substantial risk to the environment and agriculture.

Just as landowners must control weeds on their property, Teton County is responsible for controlling weeds on our properties and rights of way. Additionally, we offer consultations, equipment rental, help with plant ID, and herbicide recommendations- learn more on the Services page.

Teton County will be controlling weeds along County roads and rights of way most of the summer season. We spot spray plants and use a blue indicator die to show what has been sprayed. The herbicide is relatively non-toxic, but should be avoided until it has dried.  To ensure we do not spray along your property, control noxious weeds to the edge of the road.  As always, please contact us with specific concerns or for more information. 


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