I feel as though the dirt is too thick, too compressed, not airy, I see a cement pad that the plant is planted in in my head is this correct?. Did you add perlite, vermiculite, wood chips to that soil?
Not only is your plant not producing undergrowth it has a very thin stem and your leaf picture looks as though she just wants a little more nitrogen.
Hmm I will also give you a bit of advise because they all think the same..... If you would like to transplant your plant just go ahead and cut like 3-5 inches off the bottom of that bucket with a saws-all of something similiar then set that bucket onto - into a new hole. Dig that new hole out enough where you can sink that bucket into the earth 4 to 6 inches up the newly cut bucket.
Becarefull when cutting around the bucket though. I usually leave a skin of plastic then take the rest off accordingly. As far as we are in the season I would also use some sort of rooting solution to get them roots white and kickin for the transplant.. if that is your route you have chosen.
When all else fails and you cannot find the answer. Get away from it all and smoke a joint. Lose the anxiety and slip away to the answers.