Current Topics

Urban Coyotes

Urban neighborhoods are home to many types of wildlife including coyotes.  

Poison Hemlock

Poison hemlock flowers.

Poison hemlock (Conium maculatum) is a very common plant in North America. In Colorado, it is a List C weed which means it is recommended for control but is not required to be controlled.  Due to the increased moisture, populations are higher than normal this year.

If you have it on your property, it is best to control it when it is small. Cutting or removing before it flowers in early summer works well but may need to be repeated. If you are dealing with it once it flowers, you should clip and bag the flowers and dispose of them in the trash. Be sure to wear gloves, long sleeves, and eye protection when handling.

Treating with herbicide at the rosette stage will control it. Visit our Jeffco ISM Poison Hemlock Information page for more information.

University of California IPM - Poison Hemlock

Purdue Extension Poison Hemlock Fact Sheet (PDF)