Oregon Extension & Soil Testing Directory
Find your local Oregon County Cooperative Extension office, official state university soil analysis lab, and Master Gardener volunteer plant clinics.
🔬 State Soil Testing Laboratory
Official Lab: OSU Recommended PNW Soil Testing Laboratories
Standard Fee: $20 – $30 routine PNW 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: Willamette Valley Silt Loam & Basaltic Clay
Hardiness Zones: Zone 8b
Popular Crops: Berries, hazelnuts, tomatoes, cool-season greens, lawns
Pacific Northwest winter rains leach calcium; test soil pH every 2 years and add agricultural lime.
Featured County Directories in Oregon (1 Listing)
Multnomah County
Extension Office: OSU Extension Service - Multnomah County
Soil Lab Fee: $20 – $30 routine PNW sample
Phone: (503) 655-8631
Looking for Another County in Oregon?
Every county in Oregon 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 OSU Recommended PNW Soil Testing Laboratories or contact our editorial desk for direct local office hours.
Request Local Extension Info for Your CountyFrequently Asked Questions: Oregon Soil & Extension
How do I get my soil tested in Oregon?
To test your soil in Oregon, 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 OSU Recommended PNW Soil Testing Laboratories or your local county extension office.
How much does soil testing cost in Oregon?
Routine soil fertility analysis in Oregon typically costs $20 – $30 routine PNW sample. Turnaround time for results is usually 5 to 7 business days.
Does every county in Oregon have a Cooperative Extension Office?
Yes. Every county in Oregon 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 Oregon.
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.