depends on a lot of different things. I had vegged a plant for 8 weeks with a 600 hps and it was just under 2 feet tall but was like 3 feet around. Depends on a lot of different things
8 weeks outdoor from seed. did u fertilize? probably should be on the verge os 3 ft. by now...fertilizing would be a bit larger. 4 ft. probably, also depends on strain. indica will be shorter, and sative taller.
well i havnt used anything except for some mg soil and the tallest plant is only 2 ft. im not going to use any nutes or anything this is my first grow so im just doin basics