The Larimer County Weed District has selective herbicides available for purchase with no additional paperwork required. The Weed District is committed to offering herbicides that are proven to be the most effective with the least environmental impact. The Weed District promotes and encourages proper weed management practices on lands within the Weed District and will have herbicides on hand or available for you to order.

Reference Guides

• Weed Management Guide
• Identification and Management of Knapweeds in Colorado
• • Read more about Additional Resources

The Larimer County Weed District offers the following services to help you achieve the most cost-effective solutions to your land management issues. Please click the link below to make an appointment, or call (970) 498-5768 if you have any questions.

These lists are provided as a reference only and no endorsement is intended. Other mowers and/or applicators may be available.

The following list consists of weeds commonly found in Larimer County and considered a problem by many landowners. Because these weeds are so frequent in their distribution, management efforts are encouraged but not required in the Larimer County Weed Management Plan. Descriptions, management recommendations, and methods of control are listed.

The Larimer County Weed District is responsible for noxious weed management in the unincorporated areas of the county as mandated by the Colorado Noxious Weed Act and outlined in the Larimer County Noxious Weed Management Plan.

Weed management decisions vary according to plant life cycles, infestation size, environmental parameters and management objectives.

Successful weed management requires proper plant identification, selection of effective management methods and timing, and monitoring the effects over time.

We are thrilled that you‘re interested in learning more about conserving your land with Larimer County's Open Lands Program.