Emerald Harvest Cal-Mag

Emerald Harvest Cal-Mag is more than just a calcium-magnesium supplement. In contrast to competing products, their Cal-Mag contains kelp extract, a natural source of nitrogen and other helpful compounds, making it different from standard products of its kind. Cal-Mag helps minimize the risk of calcium or magnesium deficiencies when you use coco coir and other growing media, provides chelation to help your plants absorb more nutrients and results in greener, stronger, more productive crops.