Optic Foliar Switch, 4LOptic Foliar SWITCH NPK 0 0. 2 0. 2 Optic Foliar SWITCH enhances flower growth in plants by providing key nutrients required for development and formation of blossom set. By utilizing SWITCH during the first 2 weeks of flowering, will provide plants with the nutrition required to begin flowering. This will ensure that plants will begin to form flower sites and maximize flower growth. Using SWITCH assures no loss in growth, quality or yield. Maximize