Extremely concentrated and formulated with the best ingredients available. Ortho Silicic Acid (H4SiO4) is the 100% bioavailable form of plant-oriented Silicon (as used in professional horticulture). This improves the structure of the cell wall, which has a direct effect on the stem, root formation and resistance to diseases. Improves performance and absorption of essential nutrients. Silicon increases resistance to high temperatures and drought. It also reduces light stress.