Noxious Weeds In Gilpin County

Help us protect our wildflowers and wildlife from noxious weeds!

If you have thistles, knapweeds, oxeye daisy, scentless chamomile, or other noxious weeds, it’s important to implement weed control measures to prevent or minimize the spread.

County residents should be aware of the following noxious and/or invasive weeds:

Additional Resources

• Please be aware that not all thistles are noxious.
  Find more information on Native Thistles.
• Colorado State Weed Law and State Noxious Weed List
• Colorado Environmental Pesticide Education program
• Did you know horses can spread weeds when fed hay that contains weed seed? Check out information on weed-free hay.
• For those with new construction, newly excavated or bare areas should be revegetated to prevent weeds and erosion. Visit Mountain Gardening for local information on how to replant your land.