DaKine 420 CalMag500gCoco Coir is exceedingly popular because of its high cation exchange capacity (CEC)or ability to store and exchange nutes for weed. But if you dont buffer that growing medium with calcium for strong cell walls and magnesium for chlorophyll production, your plants may turn yellow in protest. CalMag is a 12-2-12 product containing 6% Calcium and 3% Magnesium for consistently beneficial results.
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