One nanner could turn 50-100 buds that are viable in same space to make seeds...
It takes only one to pop...
I, Recently grew some bag seed out, and had a 6-7 week nice budded plant go hermie on me... OVER NIGHT...
I checked the night before, all fine...then first thing in morn... Nanners....Thought I had caught them all...
Wrong... I had 5 plants that had buds on them, all 5 ended up with a few seeds...
I also had 5 or 6 plants without buds, and they were fine...
Wash your hands after touching your plant... and don't touch any others...
Good Luck man...