blodey hell, this thread is still going?
any moon effects on plant growth are more likely to be due to night time light levels... the difference out in the countryside of full or new moon on available light at night is actually very noticable.
but it won't effect plant gender, only genetics (and to a far lesser extent environmental stress) can really affect that; as evidenced by feminised seeds.
seriously...
also the zodiac is entirely arbitrary (and the constellations... well I'm just saying, you probably need to smoke a hell of a lot before they start looking like what they're meant to be). so in fact Virgo is nothign to do with weed turnign out female... just like I know a lot of guys out there who're Virgos and they certainly aren't women just because of that, same goes for people concieved during the virgo timeperiod