Oklahoma · university & extension labs
Where to get a soil test in Oklahoma
A soil test is how you stop guessing at fertilizer and fix the one thing your lawn actually needs. In Oklahoma, the public program below tests homeowner samples and interprets the results for local soils.
Oklahoma state lab
Oklahoma State University Soil, Water and Forage Analytical Laboratory
OSU soil, water, and forage testing.
Visit the lab & sampling instructionsDrop-off
County drop-off & extension offices.
County extension offices across Oklahoma stock sample forms and accept samples for the state lab. 77 of the most populous counties are listed below; the full directory has one for every county.
Not your county? Find your local office in the full Oklahoma directory.
- OSU Extension, Adair County officeStilwell, OK
- OSU Extension, Alfalfa County officeCherokee, OK
- OSU Extension, Atoka County officeAtoka, OK
- OSU Extension, Beaver County officeBeaver, OK
- OSU Extension, Beckham County officeSayre, OK
- OSU Extension, Blaine County officeWatonga, OK
- OSU Extension, Bryan County officeDurant, OK
- OSU Extension, Caddo County officeAnadarko, OK
- OSU Extension, Canadian County officeEl Reno, OK
- OSU Extension, Carter County officeArdmore, OK
- OSU Extension, Cherokee County officeTahlequah, OK
- OSU Extension, Choctaw County officeHugo, OK
- OSU Extension, Cimarron County officeBoise City, OK
- OSU Extension, Cleveland County officeNorman, OK
- OSU Extension, Coal County officeCoalgate, OK
- OSU Extension, Comanche County officeLawton, OK
- OSU Extension, Cotton County officeWalters, OK
- OSU Extension, Craig County officeVinita, OK
- OSU Extension, Creek County officeKellyville, OK
- OSU Extension, Custer County officeArapaho, OK
- OSU Extension, Delaware County officeJay, OK
- OSU Extension, Dewey County officeTaloga, OK
- OSU Extension, Ellis County officeArnett, OK
- OSU Extension, Garfield County officeEnid, OK
- OSU Extension, Garvin County officePauls Valley, OK
- OSU Extension, Grady County officeChickasha, OK
- OSU Extension, Grant County officeMedford, OK
- OSU Extension, Greer County officeMangum, OK
- OSU Extension, Harmon County officeHollis, OK
- OSU Extension, Harper County officeBuffalo, OK
- OSU Extension, Haskell County officeStigler, OK
- OSU Extension, Hughes County officeHoldenville, OK
- OSU Extension, Jackson County officeAltus, OK
- OSU Extension, Jefferson County officeWaurika, OK
- OSU Extension, Johnston County officeTishomingo, OK
- OSU Extension, Kay County officeNewkirk, OK
- OSU Extension, Kingfisher County officeKingfisher, OK
- OSU Extension, Kiowa County officeHobart, OK
- OSU Extension, Latimer County officeWilburton, OK
- OSU Extension, Le Flore County officePoteau, OK
- OSU Extension, Lincoln County officeChandler, OK
- OSU Extension, Logan County officeGuthrie, OK
- OSU Extension, Love County officeMarietta, OK
- OSU Extension, Major County officeFairview, OK
- OSU Extension, Marshall County officeMadill, OK
- OSU Extension, Mayes County officePryor, OK
- OSU Extension, McClain County officePurcell, OK
- OSU Extension, McCurtain County officeIdabel, OK
- OSU Extension, McIntosh County officeChecotah, OK
- OSU Extension, Murray County officeSulphur, OK
- OSU Extension, Muskogee County officeMuskogee, OK
- OSU Extension, Noble County officePerry, OK
- OSU Extension, Nowata County officeNowata, OK
- OSU Extension, Okfuskee County officeOkemah, OK
- OSU Extension, Oklahoma County officeOklahoma City, OK
- OSU Extension, Okmulgee County officeOkmulgee, OK
- OSU Extension, Osage County officePawhuska, OK
- OSU Extension, Ottawa County officeMiami, OK
- OSU Extension, Pawnee County officePawnee, OK
- OSU Extension, Payne County officeStillwater, OK
- OSU Extension, Pittsburg County officeMcAlester, OK
- OSU Extension, Pontotoc County officeAda, OK
- OSU Extension, Pottawatomie County officeShawnee, OK
- OSU Extension, Pushmataha County officeAntlers, OK
- OSU Extension, Roger Mills County officeCheyenne, OK
- OSU Extension, Rogers County officeClaremore, OK
- OSU Extension, Seminole County officeWewoka, OK
- OSU Extension, Sequoyah County officeSallisaw, OK
- OSU Extension, Stephens County officeDuncan, OK
- OSU Extension, Texas County officeGuymon, OK
- OSU Extension, Tillman County officeFrederick, OK
- OSU Extension, Tulsa County officeTulsa, OK
- OSU Extension, Wagoner County officeCoweta, OK
- OSU Extension, Washington County officeDewey, OK
- OSU Extension, Washita County officeCordell, OK
- OSU Extension, Woods County officeAlva, OK
- OSU Extension, Woodward County officeWoodward, OK
The steps
How it works.
Get a form and sample the way your lab says to
Pick up a form at a county office or download it from Oklahoma State University Soil, Water and Forage Analytical Laboratory. Where you pull cores and how you mix them decides whether the report means anything, so follow the lab's instructions exactly.
Send it in
Take the sample and its completed form to a county office, which routes it to the state lab, or mail it in yourself.
Turn the report into a plan
When results come back, the numbers only matter if they change what you put down. Enter them in the app and it builds the plan.
The app · soil report analyzer
Got your Oklahoma 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, so your numbers get compared against turf targets that 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 in Oklahoma?
- Oklahoma's public soil testing is run through Oklahoma State University Soil, Water and Forage Analytical Laboratory. Many county extension offices (listed on this page) stock the sample forms and can help you submit. National mail-in labs like Logan Labs, Ward Laboratories, and Waypoint Analytical are established alternatives.
- How much does a soil test cost in Oklahoma?
- Fees vary by lab and by which package you choose (basic pH plus phosphorus and potassium, versus expanded panels with organic matter and micronutrients). Check Oklahoma State University Soil, Water and Forage Analytical Laboratory for current pricing before you send a sample; the page linked here is the authority for its own fees.
- How do I turn my Oklahoma soil test into a fertilizer plan?
- Enter your report values in the Lawn Dominator app and pick your lab so units and extraction method are handled correctly, and it compares your numbers against turf sufficiency targets and helps build the fertilizer plan for your grass type.
Looking for another state? See the national map of soil test labs. Oklahoma State University Soil, Water and Forage Analytical Laboratory is the authority for its own test menu, sampling instructions, fees, and result interpretation.