I have read a few different articles about nanners I go them on my first and second grow but didn’t do any research on them until I had harvested the second grow. Most said the same thing on the subject, Nanners are brought on by stress, and by the time they appear they have already pollenated the plant. I don’t remember any thing about the nanners opening and spreading the pollen like male pollen sacks do. There was no mention about the seeds growing hermie plants but they did mention that any seeds that are collected will most likely be fermionized plants.
The few seeds that I did collect and get to sprout from the plants that had nanners did all grow fem plants but there were only a dozen or so out or like 4 oz. of flower. On the first grow I only had one plant, but the second grow (different strain) only one plant grew nanners and it did not pollenate the other plants if the grow.
I messed up this grow and stressed my plants out majorly (7 days no water) had 6 plants killed one and turned one hermie. I managed to save 4 and one of them has nanners, I decided to let it go and see what the turn out is. I am always in flower been doing a perpetual grow for about two years now, I have two 4x4 grow that I can flower in and a separate area for seeds, clones and small plants. I start a new flower cycle every 5 weeks.
I really need to start saving all the articles I read and post them on my journal so they can be shared. Something to remember in the future
Hope this info helps, Happy growing.