Urban Farm Fertilizers Garden of Eden Hydroponic Nutrient, 1/2 Gallon High-performance, micro-brewed 1-part flowering nutrient for indoor hydroponic gardening. 3.6-6.0-3.8 NPK. Super-concentrated: 256:1. One tablespoon/gallon of water. 100% complete, 100% water soluble, precision formulated and blended. Made from organic components, mycorrhizae, humic acid, kelp, enzymes, and minerals. Calcium rich: proprietary blending technology allows up to 4%.