Keep your plants productive and green with Cal-Mag, a calcium and magnesium supplement from Emerald Harvest®. Containing top-quality ingredients, Cal-Mag is designed to nourish crops with extra calcium and magnesium and create the right conditions for abundant flowering and a heavy yield. This is especially important when growing in some media, such as coco coir, but any garden can benefit. Use Cal-Mag as a supplement to a base nutrient series for guaranteed professional results.
The Emerald Harvest® Cal-Mag 2 - 0 - 0 is far and away, one of our most popular items. People can't seem to get enough of it.
Inventory Last Updated: Jul 03, 2022