Botanicare® Cal-Mag Plus® 2-0-0 is a highly fortified calcium, magnesium, and iron plant supplement formulated to correct common deficiencies. Supplementing your preferred nutrient program with Cal-Mag Plus® is strongly recommended when using reverse osmosis water, and when growing in coco coir based medias to compensate for natural calcium draw. Cal-Mag Plus® can also be applied as a foliar spray to further enhance growth. As plant cultivation experts, Botanicare® is dedicated to providing superior plant food, expert advice, and support to help growers produce better crops.