Colorado Noxious Weed List
List A Species If you find it, eradicate it.
List B Species Help stop the spread.
List C Species Here to stay and supported through management plans.
Watch List Species Report to EDDMapS! More information needed to assess the threat. Colorado Watch List - Pocket Guide
Printable: Noxious Weed List sorted by Common Name and by Scientific Name.
Need Help Identifying A Weed?
Contact Your County Weed Manager or Local CSU Extension Agent.
List A Species
Not Known In CO | Fewer Than 10 Known Populations | More Than 10 Populations
Fewer Than 10 Known Populations
More Than 10 Populations in Colorado
