Weed Identification & Management Resources

The Colorado Department of Agriculture maintains an up-to-date list of all species currently defined as noxious weeds in Colorado, and maintains the database with helpful identification information and reference pictures online.

County governments also often provide noxious weed databases, and Jefferson County has a very helpful database with several images and a simple layout for identifying characteristics for each species.

CSU extension published a pocket guide in 2013 to commonly found weeds across the front range, with simple steps to ID weeds and great reference photos. The guide covers some undesirable weeds that are not considered noxious as well, but is not a comprehensive list for all noxious weeds in Colorado.