Its is said that its best to flower after pre flowers are shown or after 6th node what ever but i agree this is down to other factors like heght,time ,space and imo strain . I have been folowling mobays grows for the last 2 years and due to circumstances he can only afford vegging for 1 week with some strains and it has been very intresting seeing some of his results like nebula he yeilded exeptoinaly well for only a week veg, with big bud he done real well with but some strains like ice 2000 didnt handle that short of veg.Its really down to each grower.I weight till pre flowers have shown before flower but mobays now takes a cutting from each strain in flower and keeps the clone thats mother does best in flower and keeps that as a mother and clones get a week veg now. but it just shows it can be done.look up one of his threads on nebula the results are very intresting.the postman.