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Taking a Good Soil Sample

Beneficial results of a soil test depend on a good sample. A soil sample must be taken at the right time and in the right way. The tools used, the area sampled, the depth and the correct mix of the sample all influence quality of the sample.

The Timing-

Ideally the soil should be tested a few months before planting. This allows time for lime applications (if recommended) to adjust the pH of the soil before you plant. You can test with less time before planting but it will be difficult to correct ph issues ahead of time.

The Right Way-

Use a clean probe or spade to take the sample.

If a spade or shovel is used, dig a V-shaped hole to the sample depth (4-6”), then cut a thin slice at the sample depth.

Each sample should represent only one type of soil or area- for example, a lawn, vegetable garden or landscaped area. If soil varies in these areas take separate samples for each soil type. For each unique area take at least 6-8 subsamples.
Soil Sample Diagram

Mix soil subsamples from each unique area in a clean bucket. Do not use a bucket that has held fertilizers or chemicals. Be sure to mix thoroughly. Allow samples to dry before transporting them to testing site.

Be sure to attach a note to each sample that contains your contact information including name, address, phone number and an email address. Also label the type of sample (lawn, vegetable garden, landscape area, etc...)

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