Depends on the strain. I use to veg for months until I saw the 12/12 from seed. I veg for 2 weeks then 12/12. I have 7 plants in flower for 8 weeks now and 2 are under 12" while 2 are 3' and the others between. I've gotten 3oz off a plant and I've had one get a 1/4 of an oz. Try and see how it goes