Press Release 6/25/2019 – Noxious Weeds are Illegal in Colorado

In Alamosa, along with the rest of Colorado and most of the United States, noxious weeds are illegal. Noxious weeds are non-native aggressive invaders that replace native vegetation, reduce agricultural productivity, are poisonous to livestock in some cases, cause wind and water erosion, and pose an increased threat to communities from wildfire.

Also in the City of Alamosa, any non-ornamental vegetation that has bloomed or reached a height of eight (8) inches shall be considered noxious whether or not it appears on the noxious weed list referenced below. No thistle or knapweed species contained on noxious weed list A, B, or C may be considered ornamental vegetation, and must be removed.

You can get help identifying noxious weeds along with tips to help eradicate them on your property at If you do not have internet access, you can use a public computer at the Alamosa Public Library along with other resources you can reserve.


The City of Alamosa is a multi-cultural community of 9,000+ centrally located in the San Luis Valley of Southern Colorado. The City was incorporated in 1878 and is the gateway to the Great Sand Dunes National Park and Preserve where more than 300,000 visitors enjoy Colorado’s natural beauty each year. For more information visit us at

You may also like...

Skip to content