HESI Phosphor Plus gives extra phosphorus and potassium for blooming and flower-forming plants. Flowering plants have a steadily growing demand for phosphorus and potassium. HESI Phosphor Plus adds just the right amount of these substances at just the right time. The pH corrector contained in HESI Bloom Complex is also active in combination with HESI Phosphorus Plus. HESI Phosphorus Plus can also be used in all forms of phosphorus or potassium deficiency.