Your next logical step is to force your plants to declare what sex they are. There are a few ways to do this, the easiest would be to limit their daylight to 12 hours each day. After a week or two of 12/12 the plants will show you a white hair at the leaf stem junction or balls.

As soon as they declare sex return them to the natural photoperiod. Keep replanting them into a bigger pot each month. They will do the rest. Also look around for a place to stash your plant. It may get quite large.

Good Luck.