General Hydroponics Flora Grow, Bloom, Micro Combo Fertilizer set, 1 Quart (Pack of 3) GH Flora Series is the original Building Block Nutrient System imitated but never duplicated; Contains complete Primary, Secondary and Micro Nutrients for enhanced yields and better crop quality Users can adjust mixtures to suit specific plant needs; Enhances flavor, nutrition, aroma and essential oils in both hydroponic and soil cultivated plants Contains highly purified concentrates for maximum solubility PH balanced for ease of use; NASA and Antarctic research scientists choose Flora Series -- because of its superior formulation and reliability