how is this possible??

hey,
Has anyone ever bought the feminized seeds from nirvana, and if so were they all female? Just wonering how this would be possible? please anser back all your really smart plant growing people. thanks

ive had a 75/25% 25% being hermie. but you have to be really carfull, that you dont stress the plants. no lite leaks, over/under warering, and most of all get a timer. dont forget if you do get any hermies make sure you get rid. like you would with a male. they can infect a full grow and send every female hermie. if you dont take them out , fast enuf. just be carfull. and youll be fine.

Out of 40 feminized seeds this past growing season I had 100% females..They weren't all mine a friend split them but we had 100%

anyone else?