im growing in a 5x5 i have six plantsabout 16" tall - cheese, just about to flip they were veged under 600w mh, when flip will be under 1000hps, its my first grow, apparently the strain i have double in size during flower.. i was hoping for 1 grm per watt, but anything over 0.5 per watt is more realistic hopefully i suprise my self.. i run ebb n flow buckets.. i think 12 plants would have been better than 6, less veg and higher yield i believe.. well good luck..