Grotek VitaMax (1-1-2) is specially formulated to improve plant growth and encourage larger blooms, fruits and flowers. It contains macronutrients and added magnesium to aid in the formation of chlorophyll and other essential plant compounds. VitaMax should be used in conjunction with your regular feeding program or as a supplement to individual plants when necessary. Use once a week up to the last ten days of flowering then discontinue use.