you need to go indoors for this I believe, correct me if I am wrong but you need to change the light schedule to almost 24hrs but just a little dark for rest and this should take about 2 weeks or a little longer.
But I have thought on the subjuct but I never thought of a way to do this outdoor.
im in the same boat as u
i planted my girl in the winter and it started flowering at a whopping 5 inches lol
just let mother nature work her light cycle and it will go back to veg