Welcome to Jefferson County Extension
Discover... Learn... and Explore with us!
Come to the Fair!
Our 4-H youth will have competitions, activities and demonstrations at the Jefferson County Fair August 8-10. Click here for details.
Fireblight Disease Rampant
What to do About Hail Damaged Plants
Please see this web page for more information.
Emerald Ash Borer Found in Boulder
Emerald Ash Borer (EAB) was found in Boulder, CO, in September 2013. As a non-native insect, EAB lacks predators to keep it in check. EAB only attacks ash trees, and is responsible for the death of millions of ash trees in the midwest.
To help you decide about treatment options, please see the fact sheet "Control Options for Emerald Ash Borer in Colorado" by CSU Extension Entomologist Whitney Cranshaw at this link on the Colorado Department of Agriculture's web site.
Please note that no hardwood tree samples can be brought to the Jefferson County Plant Diagnostic Clinic from Boulder County.
Plant Diagnostic Clinic
Follow these links:
Jefferson County CSU Extension empowers county citizens and enhances their quality of life through education, innovation and excellence in service.
- THE FAIR! Support 4-H and visit the Fair - August 8 - 10
- Native Plant Master Level II Course - Begins Sept. 9 - Class full - click here to be put on the wait list
- Gardening with Native Plants - Sept. 9 - 6:30 - 9:30 pm
- Webinar - Rare Plants of Colorado - Oct. 2 - 10 - 11:30 am