flowering question

hey guys.
i have 4 plants that i cant sex, so i have put them in the flower room. How long is it safe to leave males and females together before pollination occurs?
i figure it will be easier to sex them after a week or so in the flower room, i have some ladies in there on there fourth week of flowering so am just checking, any comments will be gratefully received.

thanx

get any males out before the flowers blossom.....you will have lotsa time....as you can determine which are males by the pre-flowers, which are not capable of pollinating anything.....YET.
good luck

thanx man

just look for nutz... youll have plenty of time to remove em before you would have any problems...