well really, all it takes is a female name.. like heather or brittany, and then make it wear a dress every day to school... Oh and every so often beat it and call it a slut....

it may not be an ACTUAL female by the time you're done - but it'll darn well THINK it is! har har






but the truth is, no. sex is pre-determined. there's nothing you can do except not stress the plant, so it doesn't turn hermy on you. At least I think that's the deal. I'm new at this too, so I might be wrong.