Soil Amendments

Boost the health of your soil and plants with organic soil amendments!

53 products

Gloved hands applying soil amendment around a young plant

Soil Amendments and Soil Testing

Soil amendments are used to change specific chemical, biological, or physical soil properties. Select an amendment from a documented need, ideally supported by a soil test, crop requirement, and the product's analysis or label.

Do not treat all amendments as interchangeable. Review application rate, timing, incorporation, certification wording, and handling precautions. For structure-focused materials, visit Soil Conditioners; for plant nutrients, see Fertilizer and Growing Supplies.

Soil Amendment Guides

Learn when and how to use pine needles as mulch, including practical considerations for soil and planting areas.

Match the Material to the Goal

Start with soil testing when evaluating pH or nutrient-related changes. Consider existing soil conditions and previous applications before adding another material. For containers, compare growing mediums intended for the root environment, since an amendment alone is not necessarily a complete potting mix. Follow the product directions for preparation and use.