How do you know when to harvest a male marijuana plant?

harvesting male plant .it depends on wether you want to gremanate you femal if you wish not to have crossplollinate or[seeds]kill the males as soon as sex type is decovered but if you witsh to crosspollneate or just want theplant for its t.h.c the best time is two weeks after the flowers apeeir and if you want tocrossplonate use q-tiprub flowersput in air tight bag bowl when femal rug buddd