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Hy-Pro's Cal-Mag provides calcium, magnesium, and iron, trace elements that are essential for growth and a great flowering period.

The use of calcium and magnesium is vital in soft water regions and for reconstituting water from an osmosis filter.

The extra iron content comes in handy in coco or hydroponic crops where this microelement tends to lack. Iron is vital for the production of chlorophyll and functions related to the plant's metabolism.


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Cal-Mag by Hy-Pro regularly revitalizes your substrate.

Type and Use

Cal-Mag by Hy Pro provides the calcium and magnesium that cannabis plants need for growth and flowering. Suitable for use in all types of grow and with any kind of substrate.

Plant Benefits

Cal-Mag is an indispensable product for reconditioning water from the osmosis filters or supplying calcium and magnesium to soft waters, that is, water with a EC lower than 0.4 mS

  • Calcium is needed for the correct development of the cannabis plant. It provides stability to the cell wall and takes part in numerous physiological processes, for example, in the plant's response to biotic stress or in the regulation of nutrient transportation. Deficiency can reduce flowering if it occurs during the bud fattening phase when the plant needs calcium the most.
  • Magnesium is the core of the chlorophyll molecule; it's indispensable for photosynthesis. It increases the absorption and transportation of phosphorus, magnesium deficiency leads to weak stems. It triggers numerous enzymes and enhances crop yields. Moreover, it improves the substrate's texture.
  • Iron is involved in the biosynthetic pathway of chlorophyll and is indispensable for photosynthesis.

Instructions for Use and dosage

Shake well before use.

Mix 2.5 ml of Cal-Mag by Hy-Pro for every liter of water. Use during the growth phase and flowering.

To reconstitute osmotized water, apply until reaching a EC of between 0.4 and 0.6 mS

La Huerta's Opinion

Cal-Mag by Hy-Pro is a calcium and magnesium additive, with microelements, that does not replace the use of fertilizers and growth and flowering stimulants.

For optimal results, we recommend using it alongside a growth base fertilizer like Hy-Pro Terra or Hy-Pro Hydro rooting stimulant such as Hy-Pro Rootstimulator, and flowering stimulants Epic Bloom in soil substrate and Epic Boost in hydroponics.

Data sheet

Type of composition
Mineral or chemical
Growth stage
Type of stimulant or additive
Nutrtional complement
Type of grow
Aeroponic grow
Coco grow
Hydroponic grow
Soil grow

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