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The Extension office provides assistance and programs for the community without discrimination in five main areas: Agriculture, Horticulture, Family & Consumer Science, Natural Resources and 4-H Youth Programs.

Horticulture Services   arrow

Professional arborist at work

Get Help On-line

Click here to expand or collapse this section, which contains information for on-line resources, publications, and blogs.
    • CSU Extension has several publications for the Colorado gardener. Fact Sheet are available on: Gardening Basics, Diseases, Flowers, Fruits & Vegetables, Trees and Shrubs, and Yard.  GardenNotes (Master Gardener Publications) are more in-depth information from Colorado Master Gardener training, and publications for sale on topics include: flowers, fruits and vegetables, gardening basics, household plants and insects, and trees & shrubs.
    • Ask an Expert Get expert answers and help from Cooperative Extension/University staff and volunteers from across the United States.
    • Planttalk Colorado provides information on over 500 horticulture topics from Colorado horticulturists and professionals.
    • Plant Select program is a leading non-profit cultivator, distributor and educator of plants designed to thrive in the high plains and inter-mountain region.
    • Co-Horts blog provides advice and observations from your CSU Extension Horticulture Agents and Specialists.

Services Available

Click here to expand or collapse this section, which contains information on the Gardening Help Desk, plant diagnostic services for home owners and the green industry.

Colorado Master Gardener

The Colorado Master Gardener help desk in Boulder County is open for phone calls, emails, or walk-in consultations every MWF, 9 a.m. to noon and 1 p.m. to 4 p.m. from March 1 through October 31. Email them at, or contact by phone at 303-678-6388.

Plant Diagnostic Services

Diagnostic services available: the CSU Extension Boulder County plant diagnostic services consist of paid staff and volunteers with specialized training in plant problem diagnosis through visual inspection and microscopy.

1. Visual plant diagnostics for identification of diseases, disorders, and insects. $7 Boulder County resident; $11 non-resident

2. Weed/Plant ID $4 each; Boulder county residents first 2 free.

3. Virus testing for Cucumber Mosaic virus, Impatiens Necrotic Spot virus, Tomato Spotted Wilt virus, and Tobacco Mosaic virus. $25

*Culturing and advanced diagnostic services available through the CSU Plant Diagnostic Clinic in Ft. Collins or the Jefferson County Plant Diagnostic Clinic in Golden.

** Please note that no hardwood tree samples less than four feet in length can be taken out of Boulder County due to the Emerald Ash Borer quarantine.

Request a Site Visit

Click here to expand or collapse this section, which contains information on how to book a LawnCheck, TreeCheck, Homeowner's Association, or Green Industry site visit.

Lawn Checks for Home Owners

LawnChecks is an on-site, lawn consultation service for home owners, for a fee of $75 per hour, per property.

Tree Team Site Visits

Tree Team site visits are available for home owners, for a visual diagnosis of up to 2 trees per property. Fee $25 per tree. Contact the Master Gardener help desk to begin the diagnostic process for helping solve your tree issue. or 303-678-6388

HOA Site Visits

HOA site visits are on-site consultations provided to property managers and HOA landscape committees for a fee of $75 per hour. To schedule your site visit email Deryn Davidson at or call the main desk at 303-678-6238.

Green Team Site Visits

Green Industry site visits are on-site visits for people working in the green industry (nurseries, arborists, landscape professionals, design, etc). To schedule your site visit email Deryn Davidson at or call the main desk at 303-678-6238.

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.