Calcium and magnesium are two essential elements that play an important role in cell production and in the process of photosynthesis (the conversion of carbon dioxide and water into glucose). This process of photosynthesis is vital for your plant. Magnesium is a building material for chlorophyll, which is an integral part of this process. Adding calcium strengthens cell walls, improves root development and nutrient uptake. This increases the overall resistance of your plant. This gives Plagron Calmag Pro 1l additional value.