As for sexing you should know what they are soon. If you have a plant that does NOT produce hairs like the other ones do, it is a suspect. Keep a close DAILY eye on it and if a week or more goes by and no hairs I would yank it just to be safe. Otherwise you may see little round pods forming instead of the hairs. These are definitely MALE and must be killed right away! One more suggestion: might want to increase light coming from the sides of your compartment. I always try to get the distance between nodes on the plants between 1 and 2 inches, making thicker, more productive vegetation, AND also... ya need to lose those shade leaves as soon as possible, but without sacrificing the sprout coming out right above it. Good Luck![/COLOR] :thumbsup: