I think you may be confused a bit man preflowers are a term for pistils that apear before you swith to flower. If there is no pistils and no balls there is no way to tell the sex.
u.g.u Reviewed by u.g.u on . preflowering hey all, i have a bunch of plants vegging right now and they pretty much all are preflowering. i was wondering if there is any way to tell the sex of the plants judging by the preflowers? i doubt it, but i reallllllly wanna know the sex of my plants!!!! Rating: 5