A lot of things can go wrong and stress ur female plant hermaphrodite. Just turn the light on randomly during the night cycle, and they should develop male flowers within a week. the best thing to do is, determine a female, freak it hermaphrodite, then find a male plant, and m8 those two together. U will have feminized seeds on the hermaphrodite plant, just make sure the genetics of the female arent hermaphrodite, as in, the plant doesnt start to seed at the end of budding. Good luck man!