Plant Booster Organic Worm Castings is a natural and safe fertilizer suitable for both indoor and outdoor use. Made with ingredients like phosphate, potassium nitrate, and nitrogen, these granules/pellets offer immeidiate-release nutrients, that is safe use on all plants. This 1 lb bag is easy to use with no need for presoakings, making it a convenient and environmentally friendly option for gardeners. Made in the United States, this organic fertilizer is perfect for promoting healthy growth iln your plants year-round.