QUALITY - All Purpose Potting Soil Indoor / Outdoor - 16 Dry Quarts - FREE SHIPPING! Top Quality Indoor/Outdoor Planting Mix. All Purpose Potting Soil is perfect for use in containers, planters, hanging baskets, and garden beds on patios, balconies, decks, and in windowsills. Developed and tested to maximize moisture retention and soil aeration for the optimal growth of plants. Ingredients: Compost 30% - 40%, Pumice, Sphagnum Peat Moss, and Coco Coir.