Contact your local county Extension office through our County Office List.

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Master Gardeners enhance Colorado communities through outreach, education and environmental stewardship.

Auditing the Colorado Master Gardener Training   arrow

Horticulture Training Without Volunteering

Adults interested in taking the Colorado Master Gardener (CMG) training without a volunteer commitment may enroll to audit the same courses in their local county. This option is sometimes referred to as the Colorado Gardener Certificate program. The course work is available for a higher fee in-lieu-of the return service.


You’ll receive in-depth horticulture training provided by University faculty, staff, and specialists.

Our program’s training includes both in-person and online classes offered through CSU Online. Courses are specific to Colorado’s climate, soil, environment, insects, wildlife, and plants. Training is a big commitment and includes reading (online, no text required), homework, in-class activities and lectures. The program is interesting, fun and social.

Topics include: Soils & Amendments, Botany, Vegetables, Entomology, Integrated Pest Management, Plant Pathology & Diagnostics, Turfgrass Management, Weed Management, Science of Planting Trees, and Tree Care. Depending on your location you may have Mountain Gardening, Fruit Trees, Small Fruits, Pruning, Irrigation and other relevant subjects.

You’ll be expected to attend 80% of classes and pass the final exam (open book, open note, researching encouraged) with a 70% or better.


Upon completion of the course, you’ll receive a Colorado Gardener Certificate.  However, because there is no subsequent volunteer commitment, participants do not become Colorado Master Gardeners.

The Colorado Gardener Certificate may be displayed in a place of business and used in business marketing. 


To register for audit the CMG Training (non-volunteer), first check with your local County Extension Office to see IF they are offering training and what the schedule of classes will be.

Once you’ve confirmed the training schedule, you can register online. REGISTRATION IS CURRENTLY CLOSED FOR WINTER/SPRING 2020. Check back this summer for future trainings or ask your local CSU Extension Office for an upcoming schedule.

Note: Space is limited. Completing registration does not guarantee space. Once you pay the required fee to your local county, they will confirm registration.

2020 fees will be $530. This course is comparable to a 4-credit class. In comparison, tuition for a four-credit class is $1,932.