Thank you!! I grow outside. I have thirysome other plants and they were all treated very gently, from seeds. They all get the same light and water. We have been lucky with enough rainfall that I didn't need to carry water in. I guess the less I am there, the less chance of a problem. Three weeks ago they were all fat and happy! I removed the plant as soon as I saw it!!! The seed was OG's.
Male's "should" show their sex first when growing from seed as opposed to females. They need to mature fastet to make sure they can spread their pollen early in flowering to ensure proper seed development. However if like you said three weeks ago everything was good and now there is a stretched hermie, then something changed to its environment and or caused a lot of stress. Simply having female seeds is not a guarantee that you will get a female plant. Multiple things come into consideration i.e. heat, training, stress, light leaks etc. I recently grew some bag seed to freshen up on my DWC skills since its been a minute and I've recently changed nutrients. However I let this bag seed develop for roughly a month and a week, put her into flowering and took clones. Somewhere along the line she turned into a hermie. Some nodes showed both female pistils and male pollen sacks. This was attributed to massive amounts of stress and an imperfect growing/flowering environment. However this was a test plant, and served its purpose.
Strains like Blueberry tend to either hermie or show nanners, due to poor genetics at least in my experience and from what I've read. So there are multiple factors. If you have a plant with only pollen sacks its a male, only pistils its a pure sensimella, both or nanners its a hermie. Also three weeks between observing your ladies? That seems a little long for such a sensitive plant.
If it isn't already obvious you should remove that plant, spray its pollen sacks with water before removing it to prevent any pollen that may have escaped from becoming air borne. Also cover it with a trash bag to prevent any pollen from spilling on your ladies.
I hope this was helpful. If I had to guess I would say either stress or light leak. Good luck.[/QUOTE]