why do you want a male in your backyard? Are you trying to breed? Pollen can move around very easily through vents, open widows, family pets and so on.. And just remember alot of people are assholes about this very special plant cause they don't understand it and will call the police on you and think they are actually doing some good.... Thats how the government brainwashes people, but then again alot of people are also getting wise to them.