Grotek Cal-Max

Brand: SKU: 020105306.

1L makes 800L of solution

Description of Grotek Cal-Max


Provides a Range of Minerals.

A rapid source of nitrogen and magnesium to support chlorophyll and protein development, which quickly re-greens plants low in nitrogen. Chelated iron adds more deficiency fighting power for lush green growth. Added calcium supports plant strength and assists in times of peak growth.

Helps with High Temperatures & Humidity.

During periods of peak growth or high temperature, calcium can be a limiting factor. This formula is designed to drive calcium movement to help avert associated plant damage. Even with sufficient calcium in the soil, high temperature and humidity may hinder plants from absorbing enough. Consider using a foliar application at that point to address the issue.

Alleviates Nutrient Deficiencies in Coir-Based Medium.

Cal-Max is amazing for amending coco coir based media, with fast acting nitrogen and a strong calcium source to assist in buffering coir’s inherent imbalance.


Corrects the most common deficiencies.
Excellent for coconut fiber.
To spray on leaves, or to soak roots.


Application ratio:
5ml per 4L (Soil / Soiless).
5ml-8 ml per 4L ( Foilar)
5ml per 2L ( Foliar)
Derived from:
Calcium nitrate, calcium chloride, magnesium nitrate, iron chelate (EDTA).
Nutrients (ppm) per 1ml/L:
Nitrogen (N) ….. 20 ppm.
Calcium (Ca) ….. 30ppm
Magnesium (Mg) ….. 10ppm
Iron (Fe)….1ppm

Application Rate: 1L makes 800L of solution. Soil/Soilless: Mix 5 ml per 4L (1 tsp per 1 gal) of water. Use as required. Water Culture: Mix 5 to 8 ml per 4L (1 to 1.5 tsp per 1 gal) of water. Use as required. Foliar: Mix 10 ml per 4 L (2 tsp per 1 gal) of water. Use as required.

Dimensions and weights

  • 500ml – 10 x 5 x 15.5 cm – 0.77 Kg
  • 1L – 9.2 x 9.2 x 19 cm – 1.215 Kg
  • 4L – 12 x 20 x 26.5 cm – 5.04 Kg
  • 10L – 9 x 9 x 10 cm – 11.205 Kg
  • 23L – 25x29x44 cm – 25.065 Kg

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