Soil labs by state
Louisiana
Louisiana homeowners are directed to the LSU AgCenter Soil Testing and Plant Analysis Laboratory (STPAL) for routine soil testing and recommendations. Current LSU AgCenter pages clearly document mailing or hand-delivering samples to the Baton Rouge lab, and they point residents to parish Extension offices for kits, bags and local help.
Checked against official sources on October 4, 2026. Rules and links change; confirm with the office listed before you act.
- State soil lab
- LSU AgCenter Soil Testing and Plant Analysis Laboratory (STPAL)
- Basic test price
- $11.00 per sample (Routine, 1-10 general-public samples)
Key facts for Louisiana
- LSU AgCenter STPAL is Louisiana’s official land-grant soil-testing lab for homeowners.
- Forms page: general-public customers either hand deliver samples or pay postage.
- FAQ: mail samples to LSU AgCenter SPESS-STPAL, 128 M.B. Sturgis Hall, Baton Rouge, LA 70803.
- FAQ: parish Extension offices can provide paper bags; sample boxes are also available at the Soil Lab.
- General-public form: Routine soil test costs $11.00 per sample for 1-10 samples.
- Current official pages show parish offices for kits and help; I did not find a current statewide page explicitly saying all parish offices accept sample drop-off.
What to do next
- Use the general-public soil test form, choose the Routine test if you want the standard homeowner analysis, and include crop information for recommendations.
- Get bags or a kit from your parish LSU AgCenter office, or package the sample as instructed and mail/hand-deliver it to the Baton Rouge lab.
- Use the parish offices directory to open your parish page, then contact the local Extension office for kit availability and local guidance.
Helpful guides
- How to take a soil sample for a lab test
- University soil labs vs. private labs vs. home kits
- How to read a soil test report
- Soil pH and lime: what your test is telling you
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