Hesi Calmag

HESI CalMag – a professional calcium and magnesium supplement for healthy and strong plants

HESI CalMag is a high-quality mineral supplement designed to add calcium and magnesium to your irrigation water. These two elements are among the fundamental building blocks of healthy plant growth, and having enough of them has a crucial impact on root system development, new tissue formation, photosynthesis, and overall plant vitality. HESI CalMag helps maintain optimal mineral balance in the nutrient solution and provides plants with ideal conditions for growth and flowering.

Calcium is essential for the formation of strong cell walls and the proper development of new plant parts. It supports healthy root growth, increases resistance to stressful conditions, and contributes to the plant’s overall stability. Magnesium, on the other hand, is a key component of chlorophyll, which allows plants to utilize light energy and perform photosynthesis. A deficiency in any of these elements can result in slowed growth, loss of the leaves’ rich green color, or overall plant weakness.

Modern growing technologies, particularly high-performance LED lighting, coconut substrates, and the use of reverse osmosis water, increase plants’ demand for calcium and magnesium. It is precisely in these situations that HESI CalMag is most useful. It helps quickly replenish missing minerals and create a stable foundation for the effective uptake of other nutrients.

The product is suitable for growing in soil, coconut substrates, and hydroponic systems. Thanks to its high solubility, it is ideal for both manual watering and automatic irrigation systems. HESI CalMag can be used throughout the entire plant life cycle—from young seedlings and cuttings through vegetative growth to the flowering stage.

Especially when using reverse osmosis water or very soft water, we recommend first adjusting the calcium and magnesium levels with HESI CalMag and only then adding basic fertilizers. This creates an optimal nutrient solution base and ensures a stable supply of essential minerals to your plants throughout the entire growing cycle.

Key Benefits of HESI CalMag

• A highly available source of calcium and magnesium.
• Helps prevent Ca and Mg deficiencies.
• Suitable for soil, coconut coir, and hydroponics.
• Ideal for soft water and reverse osmosis water.
• Promotes healthy root system development.
• Contributes to a stronger plant structure.
• Promotes chlorophyll production and intensely green leaves.
• Suitable for growing under modern LED lighting.
• Compatible with most standard fertilization programs.
• Can be used during both growth and flowering.

Dosage

HESI CalMag is used to adjust the calcium and magnesium content in the irrigation water. The exact dosage depends on the quality of the source water and the desired concentration of these elements in the nutrient solution.

• 10 ml per 50 liters of water will increase the MgO content by approximately 15 mg/l (9 mg/l Mg) and the CaO content by approximately 10 mg/l (7 mg/l Ca).
• 50 ml per 100 liters of water will increase the MgO content by approximately 38 mg/l (23 mg/l Mg) and the CaO content by approximately 25 mg/l (18 mg/l Ca).

Add the product to the water before applying base fertilizers. Always adjust the recommended amount to the water parameters, the growing system used, and the current needs of the plants.

Composition

• NPK: 5-0-0
• Calcium (CaO): 5%
• Magnesium (MgO): 7.5%
• Contains chelated iron and molybdenum for better nutrient uptake.