the only useful part is... male plants grow nutsacks(little sacks where pistils should be... but they are filled with pollen)
you can use this pollen to pollinate a female about 1 week till end of harvest....
that way the female will switch from male to female at end of flowering....
meaning
it will have big buds on it, almost ready.... and then you make it start growing seeds instead of bud because it has been pollinated... this is how you cross strains and make hybrids...
the seeds are what is hybrids though... not the bud,,, if you grow the hybrid seeds it will be a cross of mother female, and father male
other than that... the male will just grow pollen sacks, no bud, no seeds....
so i normally would just kill them off before they fuck my females up
ps 1 male plant has enough pollen power to pollinate 500 females from up to 5 miles... lol
so watch out