Power si is the original patented form of stabilized, bio-available silicic acid for crops. It is a proprietary mix of micro-elements supplemented with boric acid, phosphoric acid, and potassium sulfate. It is pure, highly concentrated, with fast visible effects. Increases absorption & utilization of nutrients reduces nutrient salt build-up & moisture dehydration of your crops. Builds stronger cell walls, decreasing susceptibility to various diseases, & resulting in stronger plants & thicker stems, & increases dry weight. Controls & reduces the space between internodes caused by environmental stress & nutrition imbalances. Resistance against abiotic (non-living physical & chemical elements: Temperature, weather, natural disasters) & biotic stress (living organisms: Pathogens & pests), & reduces the need for pesticides.