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. For those special requirement low nitrogen situations when high amounts of phosphate and potassium are needed to firm or size fruits or vegetables.