OptiCal-Mg is a powerful calcium and magnesium supplement with iron.It is formulated to make calcium and magnesium readily available to maturing plants during the critical bud, flower and fruit development phase.- Simply add OptiCal-Mg to your regular feeding program to optimize your plant’s growth potential.- Create bigger, heavier and more fragrant flowers and fruit.- Stimulate the production of essential oils.- Envigorate the overall health and development of root systems and plant structures.If calcium or magnesium deficiencies should occur, such as blossom end rot or arrested plant development, use OptiCal-Mg to correct the problem at any time during a plant’s lifecycle to restore your plant’s overall health and vitality.So whether you want to enhance plant performance or nip a deficiency problem in the bud, OptiCal-Mg offers the right solution.Detailed description:- Nitrogen 2.3%- Phosphate 0%- Potash 0%- Designed for use with all quality plant fertilizers such as Optimum Hydroponix® 2-part nutrients for hydroponics and soil or Mo’Koko 2-part nutrients for growing in coco