The Colorado Master Gardener Program

Colorado Master Gardenerssm are CSU Extension volunteers trained in horticulture and work out of the local county extension office. We extend research based education throughout Colorado to foster successful gardners, develop partnerships and build stronger communities.

We may do this through:

  • Educational workshops
  • Speakers' bureau
  • Farmer's market, garden show and fair booths
  • Answering questions through email, on the phone or in person
  • Mentoring community and school gardens
  • Mass media such as blogs, newspaper, radio, podcasts
  • Identifying plant pest problems
  • Demonstration and research gardens
Colorado Master Gardener Volunteers

Contact a CMG Volunteer about your yard and garden questions.

Search online yard and garden publications.

Colorado Master Gardener Impacts

In 2014, thirty-two Colorado counties participated in the Colorado Master Gardener volunteer program. Learn more.

Emerald Ash Borer in Colorado

The following resources provide information on the identification and management of Emerald Ash Borer in Colorado:


CO-Hort is CSU Extension's Gardening Blog

CO-Hort is CSU Extension's gardening blog. It is designed for green industry personnel, Colorado Master Gardener volunteers, and the gardening public. Enjoy the timely information for CSU Horticultural Agents and Specialists. The URL is

The Science of Gardening
Colorado Master Gardener Manual

The Colorado Master Gardener manual has been reformatted into a full color textbook, by David Whiting, Kendall Hunt Publishing Co. (ISBN 978-1-4652-4083-5).  The book focuses on research-based gardening information in 636 pages with over 600 color photographs and line drawings.  Units include the following:

Textbook: The Science of Gardening
  • Benefits of Gardening
  • How Plants Grow
  • Soils, Fertilizers and Soil Amendments
  • Diagnostics and Pest Management
  • Trees and Shrubs: Identification, Selection, and Planting
  • Pruning
  • Herbaceous Plants (Flowers)
  • Fruit
  • Vegetables
  • Lawns
  • Water Wise Landscape Design
  • Irrigation Management

To order


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