Derived from ancient seabed deposits of pyrophyllitic clay and blended with fulvate Ore, Rare Earth provides a slow release of Silicon, Humates and 72 rare earth minerals. Blend with rooting media. top-dress around plant stem or add directly to nutrient solutions. Rare Earth elements develop a crystal matrix within growing plant tissue which protects the plant from heat stress and nutrient extremes by generating a protective Silicon shield. This also deters fungal disease and reduces susceptibility to insect damage by “hardening” the plant.