Organic earthworm castings. Use to top dress indoor container plants, window boxes, hanging baskets, and flower & vegetable gardens. Also ideal to brew it into a quick compost tea by mixing with water and molasses, and aerating overnight. Gardeners have long known that there is magic in worm castings - the thousands of species of soil bacteria, amoeba, protozoa, fungi and nematodes that digest organic material and make soil nutrients more readily available to plant roots.