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 instructions →County drop-off & extension offices
County extension offices across Oklahoma stock sample forms and, in many cases, accept samples for the state lab. 77 of the most populous counties are listed below; the full directory has one for every county.
OSU Extension, Adair County office
Stilwell, OK
OSU Extension, Alfalfa County office
Cherokee, OK
OSU Extension, Atoka County office
Atoka, OK
OSU Extension, Beaver County office
Beaver, OK
OSU Extension, Beckham County office
Sayre, OK
OSU Extension, Blaine County office
Watonga, OK
OSU Extension, Bryan County office
Durant, OK
OSU Extension, Caddo County office
Anadarko, OK
OSU Extension, Canadian County office
El Reno, OK
OSU Extension, Carter County office
Ardmore, OK
OSU Extension, Cherokee County office
Tahlequah, OK
OSU Extension, Choctaw County office
Hugo, OK
OSU Extension, Cimarron County office
Boise City, OK
OSU Extension, Cleveland County office
Norman, OK
OSU Extension, Coal County office
Coalgate, OK
OSU Extension, Comanche County office
Lawton, OK
OSU Extension, Cotton County office
Walters, OK
OSU Extension, Craig County office
Vinita, OK
OSU Extension, Creek County office
Kellyville, OK
OSU Extension, Custer County office
Arapaho, OK
OSU Extension, Delaware County office
Jay, OK
OSU Extension, Dewey County office
Taloga, OK
OSU Extension, Ellis County office
Arnett, OK
OSU Extension, Garfield County office
Enid, OK
OSU Extension, Garvin County office
Pauls Valley, OK
OSU Extension, Grady County office
Chickasha, OK
OSU Extension, Grant County office
Medford, OK
OSU Extension, Greer County office
Mangum, OK
OSU Extension, Harmon County office
Hollis, OK
OSU Extension, Harper County office
Buffalo, OK
OSU Extension, Haskell County office
Stigler, OK
OSU Extension, Hughes County office
Holdenville, OK
OSU Extension, Jackson County office
Altus, OK
OSU Extension, Jefferson County office
Waurika, OK
OSU Extension, Johnston County office
Tishomingo, OK
OSU Extension, Kay County office
Newkirk, OK
OSU Extension, Kingfisher County office
Kingfisher, OK
OSU Extension, Kiowa County office
Hobart, OK
OSU Extension, Latimer County office
Wilburton, OK
OSU Extension, Le Flore County office
Poteau, OK
OSU Extension, Lincoln County office
Chandler, OK
OSU Extension, Logan County office
Guthrie, OK
OSU Extension, Love County office
Marietta, OK
OSU Extension, Major County office
Fairview, OK
OSU Extension, Marshall County office
Madill, OK
OSU Extension, Mayes County office
Pryor, OK
OSU Extension, McClain County office
Purcell, OK
OSU Extension, McCurtain County office
Idabel, OK
OSU Extension, McIntosh County office
Checotah, OK
OSU Extension, Murray County office
Sulphur, OK
OSU Extension, Muskogee County office
Muskogee, OK
OSU Extension, Noble County office
Perry, OK
OSU Extension, Nowata County office
Nowata, OK
OSU Extension, Okfuskee County office
Okemah, OK
OSU Extension, Oklahoma County office
Oklahoma City, OK
OSU Extension, Okmulgee County office
Okmulgee, OK
OSU Extension, Osage County office
Pawhuska, OK
OSU Extension, Ottawa County office
Miami, OK
OSU Extension, Pawnee County office
Pawnee, OK
OSU Extension, Payne County office
Stillwater, OK
OSU Extension, Pittsburg County office
McAlester, OK
OSU Extension, Pontotoc County office
Ada, OK
OSU Extension, Pottawatomie County office
Shawnee, OK
OSU Extension, Pushmataha County office
Antlers, OK
OSU Extension, Roger Mills County office
Cheyenne, OK
OSU Extension, Rogers County office
Claremore, OK
OSU Extension, Seminole County office
Wewoka, OK
OSU Extension, Sequoyah County office
Sallisaw, OK
OSU Extension, Stephens County office
Duncan, OK
OSU Extension, Texas County office
Guymon, OK
OSU Extension, Tillman County office
Frederick, OK
OSU Extension, Tulsa County office
Tulsa, OK
OSU Extension, Wagoner County office
Coweta, OK
OSU Extension, Washington County office
Dewey, OK
OSU Extension, Washita County office
Cordell, OK
OSU Extension, Woods County office
Alva, OK
OSU Extension, Woodward County office
Woodward, OK
Not your county? Find your local office in the full Oklahoma directory.
How it works
- 01
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.
- 02
Send it in
Many county offices accept the sample and route it to the state lab; otherwise mail it in with the form.
- 03
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
- 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.