Dutch Master Gold Silica is designed to help plants restore natural levels of silicon, a crucial element of strong cell walls. This is essential to help maximize results from high-tech performance-based nutrients like Dutch Master Gold Nutrient. Because its benefits are optimized with long term use, Silica should be given to plants early in the vegetative stage and continued through until harvest. Designed for use with all growing media, Silica is truly universal, performing well in all systems.