Hi, how many weeks before it is harvesting time where you live? Months or just weeks? I read all you weeks and it seems light slowly increased? Your stats seem good with exception of small pot(bigger pot,bigger plant) also temps are a little low but if its been out all along that shouldn't be bad, why its flowering is odd. Revegging: either you can leave the plant but take multiple low branch clones, set them at 18+hrs light,it may take several weeks and display odd growth, but once roots and leaves have developed you can proceed with grow. It may just turn to many smaller plants giving you the sea of green approach, also you could do the same to whole plant, the 18+ for 2-4 weeks then start outside again. You say you have other seeds, starting one up may be a good insurance option.
Best of luck happy growing