roots organics Nitro Bat Guano, 100% Natural Bat Guano, 9-3-1 NPK, 9 lb.Roots Organics Nitro Bat guano is an excellent source of nitrogen, phosphorus, and calcium carefully processed and sifted to make it easy to work with, Roots Organics Nitro Bat guano encourages vigorous growth and is fast acting for quick results All of the Roots Organics guano..