Down to Earth 2539 Fertilizer, 20 Pound Guaranteed Analysis: AVAILABLE PHOSPHATE (P2O5) 11.0% CALCIUM (Ca) 20.0% Derived from: Seabird Guano Enhances beneficial bacterial activity in the soil and because it's water soluble Makes an excellent tea or foliar spray when filtered Carefully blended from organic nutrients in the ideal proportions without the use of synthetics, growth stimulants or low quality fillers Guaranteed Analysis: AVAILABLE PHOSPHATE (P2O5) 11.0%, CALCIUM (Ca) 20.0%. Derived from: Seabird Guano