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Emerald Harvest Cal Mag

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This product is available.

Keep your plants productive and green in any growing medium with our top-quality calcium-magnesium supplement. Cal-Mag is especially important for preempting deficiencies when growing in certain media, such as coco coir, but any garden can benefit. Cal-Mag nourishes crops with supplemental calcium and magnesium, fostering the right conditions for abundant flowering and a heavy yield.


  • Suitable For Coco and Other Media
  • Eliminates Calcium and Magnesium Deficiencies
  • Lush Greener Growth
  • Highly Recommended For Coco Growers



Guaranteed Analysis



Cal-Mag | 2-0-0

Derived from calcium nitrate, magnesium, sulfate, calcium acetate, magnesium acetate and kelp extract.



Available in:

  • 0.95L
  • 1.89L
  • 3.79L



DO NOT MIX CONCENTRATED NUTRIENTS. Either fill your reservoir tank or watering can with water, start by adding your base nutrients into fresh water THEN add any supplementation. Always use the directed amounts as stated by the feed chart on any given week.