I had two female plants that turned hermi , not too sure the cause. Maybe it was just genetics , maybe it was because I didn't top them at all and thought they were going to get too big for the grow tent so I tied the tops down in flowering or maybe it was because I'd leave the top and bottom flaps of the tent unzipped for some fresh air when in sleep cycle (from 6pm-6am) with light leak from computer standby mode. Maybe all of the above.
Still lessons learned though. I thought the seeds were just the Calyx's waiting to fire up as they still had alot of hairs over them.
tying the tops down wouldnt do it, and a computer's glow is not likely to do it either.
heat stress, lack of water, cold stress, humidity, and nutrient stress are the usual suspects.
let me 'splain:
tying the tops of the plant down is NOT stressful to the plant, they dont mind it a bit.
you can tie them in many bizarre shapes and as long as you dont bend the limbs or stems to the point that they fold, crack split or break, it's all good. check out "LST Methods" and "Espallier" on the googles for some examples.
your computer on standby is also not what you would call "Light Stress", for that you need to turn on a strong ass light source, something brighter than you would find on a moonlit night. your computer didnt hurt nothing bro.
it's never easy to grow dope without a single nanner popping up, sometimes it's just gonna happen no matter how careful you are. if you have a plant go full on shemale then something went wrong sometime, and looking back it will be pretty apparent what it was. usually.
sometimes you get one thats just born that way.