Wisconsin Extension & Soil Testing Directory
Find your local Wisconsin County Cooperative Extension office, official state university soil analysis lab, and Master Gardener volunteer plant clinics.
🔬 State Soil Testing Laboratory
Official Lab: UW Soil and Forage Lab
Standard Fee: $15 routine garden 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: Glacial Silt Loam (Plano Soil Series)
Hardiness Zones: Zone 5a / 5b
Popular Crops: Sweet corn, cranberries, potatoes, brassicas, turf
Wisconsin prairie loam soils are fertile; routine lab testing optimizes organic matter levels.
Featured County Directories in Wisconsin (1 Listing)
Dane County
Extension Office: UW-Madison Division of Extension - Dane County
Soil Lab Fee: $15 routine garden soil sample
Phone: (608) 224-3700
Looking for Another County in Wisconsin?
Every county in Wisconsin 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 UW Soil and Forage Lab or contact our editorial desk for direct local office hours.
Request Local Extension Info for Your CountyFrequently Asked Questions: Wisconsin Soil & Extension
How do I get my soil tested in Wisconsin?
To test your soil in Wisconsin, 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 UW Soil and Forage Lab or your local county extension office.
How much does soil testing cost in Wisconsin?
Routine soil fertility analysis in Wisconsin typically costs $15 routine garden soil sample. Turnaround time for results is usually 5 to 7 business days.
Does every county in Wisconsin have a Cooperative Extension Office?
Yes. Every county in Wisconsin 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 Wisconsin.
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.