Invasive Species Management

The Jefferson County Invasive Species Management program helps the public by developing integrated management plans to control forest insect pests and noxious weeds. The program coordinates with private entities and local, state, and federal governmental agencies to achieve regional pest control.

This site includes information to help identify, control and prevent forest pests and noxious weed infestations. Our goal is to educate the public about weed and pest problems and offer solutions.


hairywillowherb - purple

Hairy willowherb

​Hairy willowherb is a Colorado List A noxious weed.  This perennial grows near water.  It reproduces by seed and has spreading roots.  This aggressive invader moves into waterways and can form thick monocultures. 
​Control with herbicide is very effective this time of year. 

What We Are Seeing This Month

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Weed Management

Week of 10/7

  • Beaver Ranch
  • Flying J Ranch
  • Pine Valley Ranch
  • Reynolds