If you intend to breed, take clones of your males and keep them perpetually in veg the same way you would a prize female.
Flower your breeder male at only a few inches- essentially, as a rooted clone.
You don't need a large male to produce a full season's worth of pollen for your seed crop.
This is much safer- you are less likely to lose the genetics- a male that is done flowering has to be revegged just like a female, and it's as stressful.