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Canna Calcium CA 12% by Canna is a single-nutrient calcium supplement, designed to treat deficiencies and to reconstitute water from reverse osmosis filters. Calcium is essential for growth, as it influences growth-regulating hormones. Furthermore, it plays a pivotal role in the process of water and nutrient transportation in our cannabis plants.


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Type and Use

Canna Calcium CA 12% by Canna provides calcium, to resolve deficiencies of this micronutrient and to reconstitute osmotized water

Benefits in the Plant

  • Calcium is a fundamental micronutrient for our plants. In the form of calcium pectate, it provides stability to the cell wall and promotes cell elongation. It helps the plant withstand heat-induced stress.
  • As it's an almost immobile micronutrient, meaning it can't be stored in the leaves for later use by other leaves, it's essential to provide calcium throughout the plant's life cycle.
  • In addition to solving deficiencies, calcium and magnesium are useful for reconstituting water from a reverse osmosis system.

Method of Use and Dosage

To resolve deficiencies, apply when watering at 1-2 ml per liter of water.

To reconstitute water coming from a reverse osmosis filter, first apply calcium until you reach an EC of 0.2 or 0.3 mS/m and add magnesium until you reach 0.4mS.



Calcium 12% total, Calcium Oxide 12%

Canna has transitioned from measuring its products in weight/weight to now weight/volume, the concentrations remain the same, only the way of expressing the product formulation has changed.

La Huerta's Opinion

Canna Calcium CA 12% has just the right ratio to be used alongside Canna Magnesium in equal proportions. Calcium nutritional deficiency is observed as rust spots on the leaves.

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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