What is a noxious weed?
The term "noxious weed" is a political (rather than scientific) designation given to a plant that is non-native to North America and has aggressive, invasive tendencies in our area, giving it the potential for serious economic, agricultural, and/or ecological damage. Often these weeds are kept in check by natural controls (e.g. predators, environmental conditions, etc.) in their native territory. However, lacking such controls in our area, these plants are able to propagate very aggressively, allowing them to crowd out native plants and dominate local plant communities.

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1. What is a noxious weed?
2. What is the Colorado Noxious Weed Act?
3. What are the noxious weeds in Pitkin County?
4. Are these the only weeds we need to be concerned about?
5. What if my neighbors don't control noxious weeds on their property?
6. Who pays for weed control?
7. How can I get help identifying weeds on my property?
8. What should I do if I find noxious weeds on my or someone else's property in Pitkin County?
9. I have introduced biological controls to control an infestation. Can the county still require additional control measures?
10. How can I help prevent the spread of noxious weeds?
11. How can Pitkin County help me?
12. Who are the municipal noxious weed contacts in Pitkin County?