I would argue that herms, true herms that is complete pollen sacs are generally a genetic mutation. Single nanners are more the result of stress during flower. It is valuable to bear the distinction as true hermaphrodism should be fairly rare. Less so of late it seems.... That said, stress herms are very common and not just for novice growers. We all make mistakes from time to time, this is where the distinction is important. Diligence is the only way to minimize errors and stress in the garden and assessing issues to mitigate the cause of stress is how you become a better gardener.
**certain stress like letting one of many dry out a bit more than you should could cause a wave of nanners late in bloom. Just as an example of how one could suffer among many, there are many factors that can cause an isolated incident even in a dialed in set up.
