Power SI Granular - 10kg Plant Growth, FertilizerPower Si Granular is the only first of its kind slow release granular formula containing stabilized silica and other proprietary ingredients. This combination plays a key role in releasing locked up nutrients from the soil. Power Si Granular provides a stable matrix to keep silica in an active state which is available to the plants for an extended period (up to 30 days after application). Strengthens cell walls increase plant vigor Increase lateral