easy i grow in a similar set up but using soil instead. i veg for about three weeks then turn to 12 12 but basically get the plants to about half the desired hight then 12 12 as like getthisordie said they will double in size.

my last grow was a armageddon but by tieing down i managed to get 3/4 oz of one very small plant. i would alsao recomend scrog growing to bulk up the overall yeild but i dont know how well this would work in such a small area i might try it on my bubble cheese that are on the go now

peace out!!!!