f you're looking to improve the strength of your plants Power Si is one of the best non-nutritional amendments you can use. Power Si is unlike other silicon amendments, it works quickly and well. Adding Power Si to your nutritional regimen results in noticeably thicker& stronger stems. Power Si works as a transport agent bringing nutrients from your root zone to the rest of your plant. You'll notice improved strength and vigor as Power Si works really well to transport nutrients e.g. calcium from the root zone to the top of your plant.