First Blueberry Auto custom DWC

Hydro should have no effect on flower time of an auto. Neither should light time. Hydro with an auto in a small area is more likely to get too big than too small since you can’t start flower when you want to not exceed height. I’m not an auto grower but I do know someone who grew this strain from seedsman recently. It was flowering beginning by of week 5. He ran 18/6 seed to harvest. It seems to be growing more like a photo than an auto. The switch to 12 hours shouldn’t have started stretch. It shouldn’t care. Photos stretch with light change, auto it’s just time. I know many people who have used seedsman and most have had some sort of issue. I think you got a photo seed in this case. The biggest problem I see is even if it’s an auto you may grow beyond the limits of your environment. Personally I’d go to 12/12 and if they go into flower you know you have a photo. Worst case it slows the growth that you may not be able to deal with anyway. Also I’d stay away from pgr’s if it’s for personal use. Or any use really. As for nutes to help start flower...not that I know of. Time (auto) or light cycle (photo) are your only option. Good luck with the grow. Following to see how it turns out.