Yes you can turn off all fans in ur room collect ur pollen get a small paint brush pick the female that you want to Polinate find one branch that you mark with a twist tie and Polinate the tip of it with the paint brush and that will b for one male then find another branch and repeat the same process then you will know which one has what pollen on it wait two or three hours b4 you turn ur fans back on then spray the tips that have been pollinated down with water to make sure loose pollen don't fly around ur grow room