The witch potion CalMagSi is an original mixture of calcium, magnesium, silicon, nitrogen and iron. This combination not only strengthens the structure of the plant, but also helps it stay green and healthy. An indispensable product, especially for plants grown in coconut fiber, with hydroponics or LED light sources, where a continuous supply of calcium and magnesium is essential. How to use: use 1-2ml/1L of irrigation water. In case of serious and visible symptoms, apply 1ml/1L of water to the leaves.