Essentials PLUS SILICON is a highly concentrated and easily soluble additive which provides potassium silicate, in the best form of silicon for plants to uptake. Highly beneficial to plants, silicon strengthens plant cell walls to produce stronger, bigger plants with thicker roots. Strong cell walls give better resistance to drought stress and help protect plants against attack by insects and pathogens. Silicon also boosts CO2 absorption, chlorophyll production and photosynthesis, resulting in bigger yields and heavier fruits. Suitable for use in all growing systems and media, alongside main nutrients, throughout the plant life cycle.