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 Analysis Lab
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: Glacial Silt Loam & Central Sands
Hardiness Zones: Zone 3b / 5b
Popular Crops: Cranberries, sweet corn, potatoes, apples, dairy forage
Wisconsin soils range from heavy silt loams to sandy soils; test to prevent nutrient runoff.
Featured County Directories in Wisconsin (6 Listings)
Milwaukee County
Extension Office: University of Wisconsin-Madison Extension - Milwaukee County
Soil Lab Fee: $15 per routine soil sample
Phone: (550) 555-0199
Dane County
Extension Office: University of Wisconsin-Madison Extension - Dane County
Soil Lab Fee: $15 per routine soil sample
Phone: (550) 555-0199
Waukesha County
Extension Office: University of Wisconsin-Madison Extension - Waukesha County
Soil Lab Fee: $15 per routine soil sample
Phone: (551) 555-0199
Brown County
Extension Office: University of Wisconsin-Madison Extension - Brown County
Soil Lab Fee: $15 per routine soil sample
Phone: (550) 555-0199
Outagamie County
Extension Office: University of Wisconsin-Madison Extension - Outagamie County
Soil Lab Fee: $15 per routine soil sample
Phone: (550) 555-0199
Marathon County
Extension Office: University of Wisconsin-Madison Extension - Marathon County
Soil Lab Fee: $15 per routine soil sample
Phone: (550) 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 Wisconsin Statewide
Need help interpreting your lab results or finding local agricultural extension agents? Fill out the brief form below:
Frequently 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 Analysis Lab or your local county extension office.
How much does soil testing cost in Wisconsin?
Routine soil fertility analysis in Wisconsin typically costs $15 per routine 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.