Espoma® Organic Earthworm Castings provide a non-burning source of Nitrogen and other essential nutrients for use on all indoor and outdoor plants. The organic matter in Espoma® Organic Earthworm Castings improves soil structure, increases water and nutrient retention, provides soil aeration, and contains desirable microorganisms. Earthworm Castings can also enhance seed germination, plant growth, flowers and fruit production. For trees, shrubs, vegetable and flower beds, spread a inch thick layer around the plant out to the drip line then work into the soil trying not to disturb the roots. For potted plants, mix one part Espoma® Organic Earthworm Castings to 4 parts potting mix prior to planting, or apply a inch layer to the soil surface and water well. Repeat every 2 months.