Bat guano, seabird guano, and rock phosphate make for a powerhouse organic fertilizer! Happy Frog Cavern Culture Fertilizer from FoxFarm also includes soil microbes targeted for flower and bud development. Mycorrhizal fungi work to increase root efficiency, nutrient uptake, and water absorption. OMI Listed and Registered CDFA Organic Input Material. 1 - 12 - 0. 4 lb. bag. Always read and follow label directions.