Every state · university & extension labs
Where to get a real soil test
Guessing at fertilizer without a soil test is how lawns get five products they do not need and none of the one they do. Every state has a public lab, usually run by its land-grant university, that tests homeowner samples and interprets the results for local soils. Click your state to find yours.
How this works
Enter your ZIP to pin your location and see the closest county office, or click your state on the map. These are the public labs and extension offices that land-grant universities run, not lead-generation sites.
The test
What a soil test tells you.
A standard lawn soil test reports soil pH (how acidic or alkaline your soil is, which controls how well grass can take up nutrients) and the plant-available phosphorus (P) and potassium (K) already in the ground. Many labs add buffer pH, the number behind the lime recommendation, plus organic matter and micronutrients. Nitrogen recommendations usually come from your grass type and season rather than the test itself.
That is what makes the test worth the effort: instead of guessing at products, you fix the actual limiting factor. University extension guidance is blunt about the flip side, too: fertilizer applied without knowing what the soil needs wastes money and can end up in waterways.
How it works
Find your closest office or lab
Use the map above. County extension offices in many states stock sample bags and forms, and some accept samples on the spot.
Sample the way your lab says to
Every lab publishes its own sampling instructions and forms. Follow theirs exactly; where you pull cores and how you mix them decides whether the report means anything.
Turn the report into a plan
When results come back, the numbers only matter if they change what you put down. That is the app's job.
The app · soil report analyzer
Got your report back? Analyze it.
Enter your report values in the Lawn Dominator app and pick your lab, and it handles the messy part: units and extraction methods differ by lab (UGA, A&L, Waypoint, Mehlich-1 labs, and MySoil each get their own mode), so your numbers get compared against turf targets that actually match how your lab measured them. Then it helps build the fertilizer plan for your grass type and checks timing against your live soil temperature.
Free to download on iPhone and Android.
Common questions
Before you ask.
- Where can I get a soil test for my lawn?
- Every state has a public soil testing program, usually run by its land-grant university's extension service. Use the interactive map on this page to find your state's lab, and in many states the county extension offices shown on the map stock sample forms or accept samples. National mail-in labs like Logan Labs, Ward Laboratories, and Waypoint Analytical are established alternatives.
- What does a lawn soil test measure?
- A standard lawn soil test reports soil pH (how acidic or alkaline the soil is) and plant-available phosphorus (P) and potassium (K). Many labs add buffer pH, which drives the lime recommendation, plus organic matter and micronutrients. Check the test menu on your lab's page for exactly what each package includes.
- Should I use my state's university lab or a national mail-in lab?
- University labs interpret results against recommendations calibrated for your region's soils, which is the safest starting point. National mail-in labs offer consistent report formats across states. Whichever you choose, stay consistent: labs use different extraction methods (Mehlich-1 vs Mehlich-3, for example), and numbers from different methods are not comparable with each other.
- How do I turn soil test results into a fertilizer plan?
- The Lawn Dominator app has a soil report analyzer: enter the values from your report, pick your lab so units and extraction method are handled correctly (UGA, A&L, Waypoint, Mehlich-1 labs, and MySoil are supported), and it compares your numbers against turf sufficiency targets and helps build the fertilizer plan for your grass type.
Mail-in
National mail-in labs.
If your state points you to a private lab, or you want a specific report format, these are the established national labs DIY lawn people actually use. Mind the notes: labs use different extraction methods, and numbers from different methods are not comparable.
- Logan LabsPopular private lab for detailed nutrient reports.
- Waypoint AnalyticalLarge agricultural lab network with soil testing services.
- Ward LaboratoriesWell-regarded national mail-in lab popular with DIY lawn enthusiasts. Reports in ppm (Mehlich-3 extraction).
- A&L Agricultural LaboratoriesRegional lab network (Eastern, Western, Great Plains). Most A&L reports use ppm; A&L Great Plains may use lbs/acre for some nutrients, so confirm the unit printed on your report.
- Midwest LaboratoriesBroad soil testing menu and mail-in options.
- Spectrum AnalyticPrivate lab used for soil fertility testing.
- MySoilKit-based mail-in option. Uses a field-moist ion-exchange resin method, so numbers are not directly comparable to Mehlich-3 labs.
- Texas Plant & Soil LabMajor southern lab (Edinburg, TX) with regional focus. Reports in ppm.
- Waters Agricultural LaboratoriesSoutheastern lab (Camilla, GA) commonly used in GA, FL, and the Gulf Coast. Uses Mehlich-1 extraction, so nutrient values (especially P and K) read lower than Mehlich-3 labs; interpret with the lab's own sufficiency ranges.
Directory
Every state lab, listed.
One primary lab per state. County extension drop-off locations appear as dots on the map when you select a state.
Auburn/Extension lab for Alabama soil samples.
Extension guidance for Alaska sampling and lab options.
Arizona Extension guidance and lab recommendations.
University of Arkansas Division of Agriculture soil testing.
CSU lab for soil, water, and plant analysis.
UGA lab for soil and environmental testing.
UH CTAHR diagnostic services and soil testing resources.
University of Idaho analytical lab services.
Extension directory for Illinois soil testing options.
University of Maine soil testing lab.
UMD Extension list of soil testing labs.
UMass lab for soil and plant nutrient testing.
MU soil and plant testing laboratory.
UNL guide to Nebraska soil testing options.
Nevada does not have a dedicated state soil testing lab. UNR Extension directs users to private labs or county extension offices. Use a national private lab (Logan Labs, Ward Labs, Waypoint) for the most reliable service.
NMSU soil and water testing resources.
OSU Extension factsheet listing soil test labs serving Ohio.
OSU soil, water, and forage testing.
Penn State soil fertility testing.
URI Extension soil testing resources.
Clemson soil testing and agricultural services.
UT soil, plant, and pest testing center.
UVM soil testing and environmental testing.
WSU Extension soil testing guidance and lab options.
Research and extension sources
- University of Minnesota Extension: Fertilizing lawns (soil-test based fertilization and runoff guidance)
- Each lab linked above is the authority for its own test menu, sampling instructions, fees, and result interpretation.