Cyco Bloom A is the first of two parts to make up the base nutrient system for the flowering stages of a plants growth. Cyco Platinum Series Bloom A is a primary source of pharmaceutical grade nitrates which are vital for photosynthesis, the making of amino acids, enzymatic formation, and cell division. With pharmaceutical grade ingredients, Cyco Platinum Series Bloom A provides certifiably the cleanest form of this crucial component to plant growth. Bloom A also contains considerable amounts of calcium. Calcium in Cyco Bloom A is derived from pharmaceutical grade calcium nitrate for a source of readily available calcium to form cell walls enabling healthy plants.