Rollitup

Breed them yourself. You can't change the sex of a seed.

All you really can do is run feminized seeds or clones.

A seed is male or female as it is created.
It is a myth that conditions in the grow room determine sex.
Feminized seeds are created by manipulating a survival strategy within the genome of cannabis.
They will only have half the genetic makeup of a proper mating.

Is that true? You know you don't have to use the exact plant to create feminized pollen