another stump question

[fiddyonefiddy]

if you dont know what your growing
someone gave me the seeds that he payed for
what is the normal rule of thumb for vegging and flowering
i am at 50 days of veg on 18/6 w/125 hps.
on some of the plants i am seeing pre flowers. i want to cut clones and sex them but not sure what time frame to do it in. i have been using only water up to this point. i started nutes yesterday.
from what ive read here there is no way to determine what the plants are by looking at them so im kinda stumped as to what time frame im in. i guess my question is do i need to root the clones first or go right into 12/12 to figure out the sexing?
thanks everyone for their help so far.im trying to get some pics up but they are to big for the website,soon as figure out how to shrink em up ill post them.
speedy

fiddyonefiddy Reviewed by fiddyonefiddy on 02-19-2008. another stump question if you dont know what your growing someone gave me the seeds that he payed for what is the normal rule of thumb for vegging and flowering i am at 50 days of veg on 18/6 w/125 hps. on some of the plants i am seeing pre flowers. i want to cut clones and sex them but not sure what time frame to do it in. i have been using only water up to this point. i started nutes yesterday. from what ive read here there is no way to determine what the plants are by looking at them so im kinda stumped as Rating: 5