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The Extension office provides assistance and programs for the community in five main areas: Agriculture, Horticulture, Family and Consumer Science, Natural Resources and 4-H Youth Programs.

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Horticulture Programs

Your information source for gardening and horticulture related programs and classes through Boulder County Extension.

Check here for articles and information in the horticultural world


Native Plant Master logo Native Plant Master
Learn about the values and characteristics of Colorado’s native plant species, as well as issues surrounding non-native, invasive plants.
Harvest of peppers Community Garden
There is a community garden located at the Boulder County Extension office.  The garden consists of several dozen plots that can be rented by community members who are in need of a place to garden.
Demo Garden Demonstration Gardens
The Boulder County Extension office is home to several demonstration gardens. Visit the Plant Select, Rock, Hell Strip and Native Gardens. All of the gardens are located around the Natural Resource Building on Boulder County’s Fairgrounds in Longmont, Colorado.
Yellow flowers Boulder County Master Gardener Program
The Colorado Master Gardener program has played an active role in the education of Boulder County gardeners for more than 35 years.
Hand holding soil and seedlings Horticulture Services
Dig in! Get green industry and gardening help from your local Boulder County Extension office. We offer consultation services including site visits, plant ID, disease diagnosis, and garden problem solving help.

PlantTalk Colorado

Planttalk Colorado™ is sponsored by Colorado State University Extension, Denver Botanic Gardens, and the Green Industries of Colorado. It provides information on over 500 horticulture topics from Colorado horticulturists and professionals.

For additional information on gardening, see Extension Publications.

Timely topics videos on PlantTalk Colorado.

Mulching leaves into your lawn by Dr. Alison O’Connor, Larimer County Horticulture Agent and Dr. Tony Koski, Turf Specialist. Leaving mulched leaves on your lawn adds organic matter to your soil and feeds the earthworms for a healthy lawn in Spring.

Winter Rose Bush Care by Luan Akin and certified arborist and Tagawa Nursery staff member Mike Landers. Learn how to use rose collars to protect your roses from harsh winter conditions, plus other tips for helping your rose bushes through the winter. by Luan Akin and certified arborist and Tagawa Nursery staff member Mike Landers.

Winter Rose Care or How to Use a Rose Collar by Luan Akin and rose supervisor and Tagawa Nursery staff member Tom. Learn how to protect your roses during the Colorado winters.

Winter Watering Trees and Shrubs by Luan Akin and certified arborist and Tagawa Nursery staff member Mike Landers. Colorado winters require winter watering of trees and shrubs to stay healthy.

Tree Care in Winter by Dr. Jim Klett, Landscape Horticulturist Don’t neglect your trees in the winter!