50% soil, 25% vermiculite, 25% perlite. The latter 2 ingredients will costs you less weight for weight than good soil. If it is your first grow stick to soil, it's all too easy to go wrong with aero and hydro if you don't know what you're doing. Plus you'll have to fork out for EC meters, PPM meters etc which aren't cheap. Yes, some professions get a greater yield with these fancy techniques but for us standard growers soil is cheaper, easier and works really rather well. Keep it real, keep it organic. Happy growing.