I have this problem every year. I start them at 18/6 for around 6 weeks and put them out late May. They usually flower for about 3 weeks and then revert back to vegetative stage. It sometimes leaves the plant looking a bit shabby and in need of a good trim. Any help would be greatly appreciated!
The strain is GHS - A.M.S.
Planted in ground with Fox farm ocean forest and peat moss
Worm castings and blood and granular bone meal at beginning
Located near central Ohio
Holes aren't flooding
Same spot/strain for 7 years without this problem
I think I got it all...