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  • Noxious Weed Management Information

    Colorado is seeing a dramatic increase in noxious weeds. These invasive non-native plants have been introduced by accident or as ornamental plants and are devastating thousands of acres of wildlife habitat and natural areas. Left uncontrolled, noxious weeds will form dense monocultures and displace native and desirable plants. Native plant loss affects wildlife that depends on the native vegetation for survival.

    Jefferson County's Weed and Pest Department works to educate landowners about the affects of noxious weeds and how to manage these unwelcome plants.

    Everyone is responsible for controlling noxious weeds on their property.

    Noxious Weed Management

    The Colorado Noxious Weed Act & Regulations View exit disclaimer policy page for links to third-party websites. require public and private landowners to manage noxious weeds on their property. Under the act, a prioritized list has been established, demanding a higher level of control for some weeds, including eradication and containment.


    This is achieved when noxious weeds can no longer spread. Eradication occurs when weeds are prevented from forming seeds or developing reproductive components.


    Containment happens when noxious weeds are controlled and cannot spread to areas where they are not known to grow.


    Suppression means managing a specific noxious weed by reducing its population and preventing it from spreading onto neighboring properties.To be effective, specific control techniques must be used on each plant species; what works to control one weed might not work on another.

    Good land stewardship is essential to preventing the spread of noxious weeds:

    • Learn to identify various noxious weeds.  
    • Quick identification allows for easy control; don't wait until your entire property is covered with weeds before you realize you have a problem. 
    • Revegetate disturbed areas. 
    • If you have livestock, don't overgraze your property. 
    • Use weed-free hay and mulch.

    Weed control is a long-term process. Be patient and practice good land stewardship. Your reward will be a healthy, native-plant community that can sustain wildlife. 

    Last Updated: 7-9-2014