Stunted 4 month Old Outdoor

So I had acquired this girl from a friend and it was in the ground for about 4 months (since early April). When he moved and gave it to me i went to water it and was pushing some dirt around and found that he had planted it in the small pot it had been in since it was a seedling in the ground! I immediately pulled the pot from the ground and took it to my house and transplanted it into a larger pot and gave it new soil and water. It was a successful transplant and its been about one week now since i gave it the bigger pot. As a result of the plant being in the ground in a pot she is only about 2' tall. I've inspected all up and down the stalk and there is barely a few tiny red hairs starting to some out. The weather is calling for it to be in the mid to high 30's at night this week but there is a lil wind so i hope it doesn't freeze her. I know its not going to be snowing or frosting over quite yet but she isn't even started to flower yet. I know that plants are aware of the season better than I but I have a friend who also has an outdoor op and his girls have been flowering for 3 weeks now while mine remains veging. Im thinking of purchasing Tiger Bloom and building a box to cover it so its 12/12 to hopefully kick start the process but before i do I wanted to hopefully get some feed back from my favorite forum. thanks everyone

Def feed it nutes.. and ya if you can make a box to put it in during the night make one. It sounds like its still in shock from being in that little pot for so long... it should come out of shock soon but the question is will you have enough time to flower? looks good