If they are what they say they are. As I understand it a single or many females are stressed into thinking the end of the season or there life is near. This can be done with strange light cycles, Or chemicals or any kind of hard stress. They will produce small male bannana pods and polinate there selves. This being a female the seeds can only be female. Extending the life to the next generation in hopes of true polination. The problem is can you trust the place your getting them from. I had NL's that were all females and now trying orange bud from dutch passion from DRchronics. Hope this helps.