I am having that problem. They just keep growing and growing but not actually making any buds only preflower. They stand around 3 feet. If they get much bigger I am going to have to get rid of them. They're 11 weeks old and still no proper bud development.I actually gave up up on one of mine and gave it the chopand it was HUGE but just not progressing in terms of flower but just getting bigger and bigger. On The other hand the second one I had kept as it was slightly more developed. All I can say is that these are the slowest developing autos I have ever dealt with. I will get a picture when I can but at approximately 75days it looks like it is only a week or 2 into flower.
The one I chopped was pretty much exactly the same stage as yours maybe 6 weeks into flower unfortunately for me 12/12 was not an option @THCHERO . It kinda figures why seedsman are throwing them in as bonus seeds as well as the free white widows at the moment. On the + side the white widows are almost finished and smell awesome. Some real old school dank.
I've just started Auto Purple by Original Sensible. Proper autoflowers. Planted them today, they should sprout in the next couple of days.