Remove the male and flower seperately.. Then once it sheds its pollen collect by holding a mirror under the male flowers and tap the branches, once you have collected 1/2 a gram or so. Get a fine artists paint brush and lightly dab the pollen onto a single female flowering branch, be careful not to get any pollen anywhere except where you want it... the benefits of doing this is you will end up with a healthy female crop with a seeded branch of between 100/200 seeds... Best of both worlds

QUOTE
how long should it take for a male to start producing pollen
About 3 weeks from showing sex