GMSgrowsanswered grow question 4 years ago Same as any other strain. Ph properly for your medium. Soiless or hydro, start at 400 ppm 0.8 ec, next week and every week, increase 100 ppm 0.2 ec until you reach around 800 ppm 1.6 ec. By then you should be ready to switch them to flower. Mac is a strong smelling strain. Keep your carbon filter going. Cheers