Idaho Extension & Soil Testing Directory
Find your local Idaho County Cooperative Extension office, official state university soil analysis lab, and Master Gardener volunteer plant clinics.
🔬 State Soil Testing Laboratory
Official Lab: UI Analytical Sciences Laboratory
Standard Fee: $40 routine soil fertility 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: Treasure Valley Alkaline Loam & Volcanic Ash Silt
Hardiness Zones: Zone 7a
Popular Crops: Potatoes, onions, apples, berries, lawn turf
Intermountain West soils are alkaline; monitor salinity and avoid adding extra lime.
Featured County Directories in Idaho (1 Listing)
Ada County
Extension Office: University of Idaho Extension - Ada County
Soil Lab Fee: $40 routine soil fertility analysis
Phone: (208) 287-5900
Looking for Another County in Idaho?
Every county in Idaho 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 UI Analytical Sciences Laboratory or contact our editorial desk for direct local office hours.
Request Local Extension Info for Your CountyFrequently Asked Questions: Idaho Soil & Extension
How do I get my soil tested in Idaho?
To test your soil in Idaho, 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 UI Analytical Sciences Laboratory or your local county extension office.
How much does soil testing cost in Idaho?
Routine soil fertility analysis in Idaho typically costs $40 routine soil fertility analysis. Turnaround time for results is usually 7 to 10 business days.
Does every county in Idaho have a Cooperative Extension Office?
Yes. Every county in Idaho 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 Idaho.
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.