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Cal-mag

Pronounced / KAL·mag /

A supplement that provides calcium and magnesium, used when plants show deficiencies, often with coco coir or filtered water.

Example in a sentence

“Her plants in coco needed cal-mag to stop the rusty leaf spots.”

Also called calmag, cal mag, calcium-magnesium

Sources (1)
  1. https://www.leafly.com/learn/growing/troubleshooting/nutrient-deficiencies
Grow guide Cal-Mag and magnesium: when you need them You're most likely to need extra calcium and magnesium if you use RO or very soft water, or grow in coco. Calcium… Grow guide Plant food basics: what N, P and K do and how much you need Use a balanced nutrient program matched to your medium and water. Studies show both shortages and excess can hurt growth. The elemental… Grow guide Getting coco coir ready before you plant Choose coco with clear washing and buffering instructions. Prepared coco may be ready to use. Raw bricks may need rinsing and product-specific… Leaf Doctor Yellowing lower leaves: what it is, and when it’s nothing Before anything else: if you're six or more weeks into flower and it's only the bottom leaves, this is probably normal.