Peat Moss as a Soil Amendment: When It Helps and When It Doesn't

Peat moss acidifies soil and improves moisture retention in sandy soils. In Maryland's already acidic transition-zone soils, its pH effect may be negligible, but it helps clay structure. However, it has zero nutrient value.

Best Use

Add peat moss when renovating—core aerate, top-dress with compost, overseed, then incorporate peat if soil is heavy clay. Mix in pelletized lime to counter acidity. Test soil pH in a month to verify results.

If compost alone suffices, skip peat moss—it's expensive and nutritionally inert.