my plants were about 2 feet tall when i induced the 12\12 photoperiod they really shoot up during the first few weeks of flowering 6 of them at least doubled in size and the other 4 damn near tripled .
as for an estimate on yeild i'd say 1-1.5lbs although i think thats being a little conservative after seeing the size of these babies and their big beautifull sugar coated buds

and as always any questions or comments always welcome and appreciated thanks everybody for all the support i dont think i could have done half as good a job without sites like this one , i would also recomend any new growers go and buy themselves a couple of good grow books i have jorge cervantes indoor grow guide and the mel frank cannabis bible very good and informative info