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 6a / 6b
Popular Crops: Tomatoes, sweet corn, berries, apples, tall fescue
Missouri heavy clay subsoils require organic matter incorporation for good root growth.
Featured County Directories in Missouri (1 Listing)
Boone County
Extension Office: MU Extension - Boone County
Soil Lab Fee: $15 per routine soil sample
Phone: (573) 445-9792
Looking for Another County in Missouri?
Every county in Missouri 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 MU Soil and Plant Testing Laboratory or contact our editorial desk for direct local office hours.
Request Local Extension Info for Your CountyFrequently 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.