well, grow one female, one male, when the male has pollen sacks do one of 2 things,
1) Make sure the plants are next to each other, and shake the shit out of the male over the female or
2) Put the male plant on a clean hard surface (Glass is perfect, ya know, if your the type of guy that has huge sheets of glass laying around) Shake the plant vigoursly (don't break it though) then sweep up the pollen with a credit card, drivers licence. THen, mannually sprinkle the the pollen on every single bud and white hair you see. Then let mother nature take it's course and make you hella seeds.