Grow More's Mendocino Producer's Choice line of fertilizers are the most advanced powders we've ever created. They are 100% water-soluble formulas containing a properly balanced mixture of all essential plant nutrients with quality-enhancing elements: calcium, magnesium, DTPA/EDDHA iron, carbohydrates, amino acids and no artificial dyes or colorings. This Mendocino line provides highly efficient performance nutrients as a standalone base nutrient or as a vegetative and bloom stimulant. For use in soilless, hydroponic, organic soils and coco coir systems. 20-9-20 is fast acting in foliar sprays or liquid fertilizer injector systems, designed for cool temperature climates when plants need extra vigor and growth.