Hello,
It's a little difficult to see the the budsites..or where they will be. But if you're not seeing any pistils and the plant is 12 weeks old...let alone 5 feet tall! You likely got sent some royal gorilla feminized or just got one of the .1% non autoflowers in the batch. Can you continue the outdoor without worry of it getting too big and it just mature through the season? If so i would say stick with that...otherwise you could somehow bring it into a space that can accommodate 12 hours of darkness but then you would also need lights, or there are light deprivation tarps that can simulate darkness outside...you would just have to put it on and off every day.