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Colorado State University Extension offices like the one in Jefferson County bring the research and resources of the university within easy reach to our community.

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Have a Gardening Question? 

Call the Jefferson County Colorado Master Gardener Helpdesk at (303) 271-6632 to get personalized help with your specific situation. You can also email questions and pictures to the Master Gardeners at Phone and email inquiries are free of charge.

Diagnostic Services

CSU Extension Jefferson County’s Plant Clinic consists of paid staff and volunteers with specialized training in plant problem diagnosis through visual inspection and microscopy. To contact the plant clinic for more questions or to get virtual help with diagnosis or identification, email: or call: (303) 271-6627. Our services and their fees are summarized below:

Diagnostic ServicesFees for Jefferson County ResidentsFees for Non-Residents
Plant Diagnosis$20$30
Plant Identification$15$25
Insect Identification$10$20
Virtual Diagnosis or Identification
(via photos/email)

For information about how to submit a sample, please refer to this document.

If you’d like to fill out our forms ahead of time, you can access them below.

For plant samples, use the Plant Sample Submission Form.

For insect samples, use the Insect and Arthropod Submission Form.

For turf samples, use the Plant Sample Submission Form AND Turfgrass Submission Form.

Commercial samples or samples requiring culturing or advanced diagnostic services should be sent to CSU’s Plant Diagnostic Clinic, located at CSU Spur in Denver, CO. To contact their lab directly, call (970) 491-6950 or email

Keeping ahead of COVID-19

This rapidly evolving coronavirus (COVID-19) has imposed an unsettling, fluid situation upon our community and its businesses. While the team here still aims to maintain a “business as usual” approach, we are making a number of significant changes to our operations to account for a situation that is far from normal.