Soil Test by State

Guides

Soil Test by State guides

Plain, sourced guides on where to get soil tested: land-grant university soil testing labs and Cooperative Extension offices by state. Every guide lists the official sources it is based on.

Soil Sampling

How to take a soil sample for a lab test

Learn how to take a clean, representative soil sample for a lab test, from choosing spots and depth to drying, labeling, and sending it in.

Read the guide →

Soil testing

University soil labs vs. private labs vs. home kits

How university soil labs, private labs, and home kits compare on accuracy, recommendations, lead testing, and the best fit for home gardeners.

Read the guide →

Organic matter and soil texture tests: are they worth it?

Organic matter and soil texture tests can be worth it. Learn when they help, when to skip them, and how to use the results wisely.

Read the guide →

Soil Testing

How to read a soil test report

Learn how to read a soil test report, from pH and lime to nutrient ratings, units, and optional lead tests, so you can make a clear plan.

Read the guide →

When to test soil, and how often

Learn the best time to test soil, how often to retest lawns and gardens, and when to ask for lead or flood-related checks before planting.

Read the guide →

Soil chemistry

Soil pH and lime: what your test is telling you

Learn what soil pH, buffer pH, and lime recommendations mean, when to add lime, how much to apply, and when liming can backfire.

Read the guide →

Soil safety

Testing garden soil for lead and other metals

How to test garden soil for lead and other metals, choose the right lab, collect samples, understand results, and garden more safely after.

Read the guide →

Lawns

Soil testing for lawns

Learn when to test lawn soil, how to take a good sample, what a report means, and where to find university and Extension soil testing help by state.

Read the guide →

Gardening

Soil testing for vegetable gardens and raised beds

Learn how to soil test a vegetable garden or raised bed, when to sample, what a basic lab test shows, and when to ask about lead or flood concerns.

Read the guide →

Soil nutrients

Phosphorus and potassium on a soil test: what the numbers mean

Learn what phosphorus and potassium soil test numbers really mean, why labs differ, and how to use P and K results without overfertilizing.

Read the guide →

Extension offices

What your county Cooperative Extension office can do for you

Learn what your county Cooperative Extension office can do, from soil test kits and sampling help to reading results and local workshops.

Read the guide →