6 weeks is good. just keep ur height limits in mind. they need training to keep them low and WIDE.
growing in pots with good training, 8 weeks of veg will fill that 4×4 tent pretty effectively.
topping to 8 mains with 4-6 week veg, you can go 16 with 8 weeks veg. the more mature the plant, the more colas it can power. to a point. from what im getting, too many tops and your bud size diminishes, but your harvest weight remains about the same. lots of extra trimming time.