Power Si - 5 Liter Root Growth, FertilizerWHAT BENEFITS CAN I EXPECT BY ADDING POWER SI TO MY CURRENT REGIMEN? Power Si provides better resistance to both abiotic stress (environmental: temperature, wind and drought) and biotic stress (living: pests and pathogens). It increases cell structures and the epidermis layer resulting in stronger plants with thicker stems to increase dry weight. Power Si also has the ability to reduce and control the space between internodes caused by temperature