Horticulture services
Need help with your landscape, yard, or garden? Jefferson County Extension can help.
Colorado Master Gardener Help Desk
Have a question about backyard gardening, trees, pest management, or general horticulture? The Jefferson County Master Gardener Help Desk is here to help. Our trained volunteers can assist with troubleshooting plant problems, identifying pests, and providing research‑based guidance for your home landscape.
You can also call (303) 271‑6632.
Plant Diagnostic Help
If you’re dealing with a plant problem that’s proving difficult to diagnose, our Plant Diagnostic Help Desk can help. We assist with identifying diseases, pests, abiotic issues, and other plant health concerns using research‑based diagnostic practices – all at no cost. Please email clear photos of your plant or landscape issue. In many cases, good images provide enough detail for our team to offer accurate, research‑based guidance. If the problem requires a closer look, you can also bring a physical sample to our office.
You can also reach the help desk at (303) 271‑6627.
Site Visits and Lawn Checks
Our site visit service offers personalized, on‑site support for a wide range of landscape questions. Whether you’re planning a xeriscape conversion, troubleshooting problem areas, evaluating plant health, or addressing irrigation challenges, a site visit provides tailored guidance specific to your property.
As part of our site visit program, we also offer CSU Lawn Check, a turf and grass focused assessment. Lawn Check examines turf health, soil conditions, irrigation, and other factors that contribute to common lawn problems along the Front Range.
Both site visits and lawn checks cost $75 for a one hour visit.
Select “Site Visit and Lawn Check” on the contact form.
Educational Workshops and Info Tables
Bring gardening expertise to your next event. Our Horticulture Specialist and trained Master Gardeners can host interactive information booths or facilitate gardening talks and workshops tailored to your audience. Topics can range from backyard gardening basics to more advanced horticulture concepts.
Select “Horticulture Info Tables or Educational Programming” on the contact form.
Soil testing Info
Soil testing services are provided by the CSU Soil Testing Lab. Jefferson County no longer provides testing kits. Please place your soil in a plastic or waterproof paper bag. Once you have filled out and printed your submittal form, include it with your sample and mail or deliver to:
CSU Spur Soil, Water and Plant Testing Lab
Room T-316
4780 National Western Drive
Denver, CO 80216
Ask Extension Colorado
Real answers from real Extension experts.
Do you have a specific question about gardening, pests, landscaping, food safety, or another topic? Ask Extension Colorado connects you with subject-matter experts who provide reliable, research-backed answers.
Submit your question online and get help straight from CSU Extensions experts and trained volunteers or browse the Ask Extension knowledgebase.