General Hydroponics Flora Grow, Bloom, Micro Combo Fertilizer set, 1 Gallon (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