It all depends on how big the pots are; If you put them in 10 inch pots, you can have 10 plants in alittle tight fitting. You VeG the plants for 1 month or 5 weeks if you don't see enough secondary growth. The light cycle for VeG is 18 of light / 6 hours of darkness and the light cycle for Flowering is 12/12 for 7 to 8 weeks (for Indicas) and 10 to 11 weeks (for sativas). What type of lights are you or your friend using for VeG and Flowering?