KALIX Phosphorus is fully soluble and derived from monoammonium phosphate. It is designed for boosting phosphorus levels during all phases of plant growth. In addition to 61% water soluble phosphate, KALIX Phosphorus also contains 12% ammonium nitrogen which plants can utilize during bloom. Phosphorus is particularly beneficial during the early rooting stage but also provides energy during fruit and flower production. KALIX Phosphorus is ideal for boosting phosphorus levels, treating deficiencies, and creating optimized recipe solutions. Works in conjunction with all nutirent and feeding programs. 25 Lb bag.