Cutting Edge Bulletproof SiCutting Edge Bulletproof Si Bulletproof Si from Cutting Edge delivers silicon in a form that may be utilized in virtually any fertilizer regimen. The silicon form (Si) has shown to strengthen plants, promote resistance to stressors and promote an advantageous upright stature which leads to favorable exposure of leaves to light. Bulletproof Si is formulated without potassium to facilitate application flexibility. Bulletproof Si is extremely beneficial