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 5a / 6b
Popular Crops: Peppers, tomatoes, melons, root vegetables, native perennials
Colorado soils are naturally alkaline; add organic compost and elemental sulfur to manage soil pH.
Featured County Directories in Colorado (10 Listings)
Larimer County
Extension Office: Colorado State University Extension - Larimer County
Soil Lab Fee: $35 routine garden soil analysis
Phone: (080) 555-0199
Denver County
Extension Office: Colorado State University Extension - Denver County
Soil Lab Fee: $35 routine garden soil analysis
Phone: (080) 555-0199
El Paso County
Extension Office: Colorado State University Extension - El Paso County
Soil Lab Fee: $35 routine garden soil analysis
Phone: (080) 555-0199
Arapahoe County
Extension Office: Colorado State University Extension - Arapahoe County
Soil Lab Fee: $35 routine garden soil analysis
Phone: (080) 555-0199
Jefferson County
Extension Office: Colorado State University Extension - Jefferson County
Soil Lab Fee: $35 routine garden soil analysis
Phone: (080) 555-0199
Adams County
Extension Office: Colorado State University Extension - Adams County
Soil Lab Fee: $35 routine garden soil analysis
Phone: (080) 555-0199
Boulder County
Extension Office: Colorado State University Extension - Boulder County
Soil Lab Fee: $35 routine garden soil analysis
Phone: (080) 555-0199
Weld County
Extension Office: Colorado State University Extension - Weld County
Soil Lab Fee: $35 routine garden soil analysis
Phone: (081) 555-0199
Pueblo County
Extension Office: Colorado State University Extension - Pueblo County
Soil Lab Fee: $35 routine garden soil analysis
Phone: (081) 555-0199
Mesa County
Extension Office: Colorado State University Extension - Mesa County
Soil Lab Fee: $35 routine garden soil analysis
Phone: (080) 555-0199
📦 Recommended Mail-In Soil Test Kits & Meters
FTC Affiliate Disclosure: We may earn a commissionIf you need immediate results without waiting for university mail-in lab turnaround times, these top-rated professional home soil test kits provide fast pH, N, P, and K diagnostic analysis:
MySoil Soil Test Kit
Professional mail-in kit analyzed by accredited labs. Returns 13 essential nutrient values (N, P, K, pH, Micronutrients) & customized fertilizer recommendations via app.
Luster Leaf Rapitest 1601
Popular color-comparator kit for 10 instant soil tests (pH, Nitrogen, Phosphorus, Potash). Includes tailored plant preference chart.
Sonkir 3-in-1 Soil Tester
Instant probe sensor for soil moisture, pH, and sunlight levels. Requires no batteries. Perfect for potted plants, lawns, and raised beds.
📋 Request Local Extension & Lawn Testing Assistance in Colorado Statewide
Need help interpreting your lab results or finding local agricultural extension agents? Fill out the brief form below:
Frequently 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.