strain depending my gg4 need 2 weeks veg and end up about 3.5 feet tall ran in flood and drain 1 gallon pots in coco. jacks 3 2 1 start to finish 24 plants per 4x4 = 1.5 lbs of nugs.
for a seed run i would use soil so you can water less often veg 2 weeks from clone no topping. maybe look into a drip system or flood table and use coco ? and go 16 per table incase you need to bend some to keep canopy even?