Soil labs by state
Indiana
Indiana homeowners generally use Purdue Extension guidance to collect samples, then send soil to a commercial lab because Purdue’s Plant and Pest Diagnostic Laboratory says it does not do soil or tissue testing. Submission methods vary by county: some Purdue Extension offices only provide mail-in kits, while others accept drop-off samples and forward them to a lab.
Checked against official sources on October 4, 2026. Rules and links change; confirm with the office listed before you act.
- Find your county Extension office
- Official page →
Official resources in Indiana
Find your county Purdue Extension office for local soil-sample instructions, bags, forms, and whether your office accepts drop-off samples.
Official Purdue guide for Indiana homeowners on when and how to collect lawn, garden, and landscape soil samples.
Official Purdue page confirming that PPDL and county Extension offices do not themselves perform soil or tissue testing.
Example official county page showing local Extension drop-off service, sample amount, and current posted fee.
Key facts for Indiana
- Purdue PPDL says it and county Extension offices do not provide soil or tissue testing; residents should use a commercial lab. (Purdue PPDL)
- Purdue HO-71 says many private laboratories in and around Indiana offer soil testing, and points residents to Purdue’s soil-lab list. (HO-71)
- St. Joseph County says its office can provide a free soil-testing kit with instructions to mail the sample to a partnered lab in Fort Wayne. (St. Joseph County Purdue Extension)
- Scott County says residents can bring about 2 cups of soil to the Extension office, which sends it to the lab. (Scott County Purdue Extension)
- Scott County posts a standard soil-test cost of $30 per sample. (Scott County Purdue Extension)
- Vermillion County posts garden soil drop-off service at $15, with organic matter analysis available for $10 more. (Vermillion County Purdue Extension)
What to do next
- Start with the Purdue county office finder, then check your county page or call the office to see whether it offers bags, forms, mail-in kits, or local drop-off.
- Use Purdue’s HO-71 guide to collect separate samples for different areas such as lawn, vegetable garden, and shrub beds.
- If your county office does not accept samples, use Purdue’s Soil Testing Laboratories PDF to choose a lab and contact that lab for current submission instructions.
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