Emerald Harvest Cal-Mag (2 - 0 - 0)

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.