Well FILTHY fletch, If you MUST know, I USE A TECHNIQUE WHERE YOU GET A SANDWICH BAG, SPRAY IT WITH BLACK SPRAY PAINT AND COVER A BRANCH ON THE 4TH-5TH NODE AND VIOLA!! YOU WILL TELL ITS SEX IN ABOUT A WEEK TO 10 DAYS.... BUT MAKE SURE THE BAG IS TOTALLY DARK.. NO LIGHT CAN ENTER.