Missouri Extension & Soil Testing Directory
Find your local Missouri County Cooperative Extension office, official state university soil analysis lab, and Master Gardener volunteer plant clinics.
🔬 State Soil Testing Laboratory
Official Lab: MU Soil and Plant Testing Laboratory
Standard Fee: $15 per routine soil sample
Turnaround Time: 5 to 7 business days
State residents can obtain soil sample bags and submittal forms at any local county extension branch.
🌱 State Growing Conditions
Soil Types: Central Mississippi Valley Silt Loam
Hardiness Zones: Zone 5b / 7a
Popular Crops: Tomatoes, sweet corn, berries, apples, tall fescue
Missouri heavy clay subsoils require organic matter incorporation for optimal root growth.
Featured County Directories in Missouri (6 Listings)
St. Louis County
Extension Office: University of Missouri Extension - St. Louis County
Soil Lab Fee: $15 per routine soil sample
Phone: (291) 555-0199
Jackson County
Extension Office: University of Missouri Extension - Jackson County
Soil Lab Fee: $15 per routine soil sample
Phone: (290) 555-0199
St. Charles County
Extension Office: University of Missouri Extension - St. Charles County
Soil Lab Fee: $15 per routine soil sample
Phone: (291) 555-0199
Greene County
Extension Office: University of Missouri Extension - Greene County
Soil Lab Fee: $15 per routine soil sample
Phone: (290) 555-0199
Clay County
Extension Office: University of Missouri Extension - Clay County
Soil Lab Fee: $15 per routine soil sample
Phone: (290) 555-0199
Boone County
Extension Office: University of Missouri Extension - Boone County
Soil Lab Fee: $15 per routine soil sample
Phone: (290) 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 Missouri Statewide
Need help interpreting your lab results or finding local agricultural extension agents? Fill out the brief form below:
Frequently Asked Questions: Missouri Soil & Extension
How do I get my soil tested in Missouri?
To test your soil in Missouri, 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 MU Soil and Plant Testing Laboratory or your local county extension office.
How much does soil testing cost in Missouri?
Routine soil fertility analysis in Missouri typically costs $15 per routine soil sample. Turnaround time for results is usually 5 to 7 business days.
Does every county in Missouri have a Cooperative Extension Office?
Yes. Every county in Missouri 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 Missouri.
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.