Colorado Extension & Soil Testing Directory
Find your local Colorado County Cooperative Extension office, official state university soil analysis lab, and Master Gardener volunteer plant clinics.
🔬 State Soil Testing Laboratory
Official Lab: CSU Soil, Water and Plant Testing Laboratory
Standard Fee: $35 routine garden soil analysis
Turnaround Time: 7 to 10 business days
State residents can obtain soil sample bags and submittal forms at any local county extension branch.
🌱 State Growing Conditions
Soil Types: Alkaline Arid Clay Loam (pH 7.5 - 8.2 naturally)
Hardiness Zones: Zone 5b / 6a
Popular Crops: Peppers, tomatoes, melons, root vegetables, native perennials
Colorado soils are naturally alkaline; add organic compost and elemental sulfur to manage pH.
Featured County Directories in Colorado (1 Listing)
Larimer County
Extension Office: CSU Extension - Larimer County
Soil Lab Fee: $35 routine garden soil analysis
Phone: (970) 498-6000
Looking for Another County in Colorado?
Every county in Colorado is supported by the state Land-Grant University Extension system. If your specific county directory is currently being indexed, you can submit your soil samples directly to CSU Soil, Water and Plant Testing Laboratory or contact our editorial desk for direct local office hours.
Request Local Extension Info for Your CountyFrequently Asked Questions: Colorado Soil & Extension
How do I get my soil tested in Colorado?
To test your soil in Colorado, collect 10 to 12 soil cores from a depth of 4 to 6 inches across your garden or field, air-dry the sample indoors, fill out your county extension submission form, and submit it to CSU Soil, Water and Plant Testing Laboratory or your local county extension office.
How much does soil testing cost in Colorado?
Routine soil fertility analysis in Colorado typically costs $35 routine garden soil analysis. Turnaround time for results is usually 7 to 10 business days.
Does every county in Colorado have a Cooperative Extension Office?
Yes. Every county in Colorado is served by the state's Land-Grant University Extension system. While our directory highlights primary regional office hubs and university labs, local extension agents serve horticulturists, farmers, and home gardeners across all counties in Colorado.
Written & Verified by Sahajul
Verified Author & Founder
Sahajul is an independent agricultural data researcher based in India and founder of LocalSoilLab.com. He specializes in compiling, structuring, and verifying US land-grant university extension services, soil lab testing fee schedules, and county Master Gardener contact directories directly from official .edu and USDA NIFA portals.