Browse Directories by State
Select your state to view county-by-county extension offices, lab prices, and office hours.
Alabama
USA1 Verified County Record(s) (.EDU Partner)
Alaska
USA1 Verified County Record(s) (.EDU Partner)
Arizona
USA1 Verified County Record(s) (.EDU Partner)
Arkansas
USA1 Verified County Record(s) (.EDU Partner)
California
USA3 Verified County Record(s) (.EDU Partner)
Colorado
USA1 Verified County Record(s) (.EDU Partner)
Soil Testing & Local Gardening Guides
Explore our library of 30 expert, non-AI guides on soil pH, fertilizers, lawn care, and extension plant diagnostics.
Understanding Your Soil Test Results
A simple guide to reading university soil test reports, reading pH numbers, N-P-K balances, and lime application rates.
Free vs Paid Soil Testing — What's the Difference?
Comparing free state university soil testing programs with store-bought plastic test kits and private commercial lab panels.
How to Become a Master Gardener Volunteer
A clear guide to signing up for county extension Master Gardener training, course costs, classes, and volunteer hours.
How to Take an Accurate Garden Soil Sample
Simple steps for collecting soil cores, correct sampling depths for lawns vs gardens, air-drying tips, and filling sample boxes.
Testing Urban Garden Soil for Lead and Heavy Metals
Spotting lead hazards in city soils, EPA safety levels, simple plant rules, and building raised beds.
How to Raise Soil pH Naturally with Lime
Learn how agricultural limestone raises acidic soil pH, differences between calcitic and dolomitic lime, and correct application rates.
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.