Dr. Earth 100507044 1.5 lb 10-3-1 Premium Bat Guano is an excellent source of fast-acting nitrogen, bat guano promotes growth of all types of indoor and outdoor plants. Can be used in a fertilizer tea for all applications and is great for plants that love nitrogen, plants in vegetative growth, vegetables and herbs.. It contains Superactive soil and seed inoculant and 5 strains of beneficial soil microbes. TruBiotic ensures organic nutrients are thoroughly broken down and then released in the soil for plant roots to absorb them as they are needed, contributing to drought tolerance, enhanced nutrient availability and increased plant performance.