Looks like you need some more light, container should be filled to the top, what are you feeding it, should be like a bush by now may be root bound, there are others around here that could offer some advise.
Big len Reviewed by Big len on . first grow 11 weeks i started with 3 but one turned out to be male , one lost all lower leaves( i cut the top and trying to root it in perlite.) the third looks good but the leaves are turning colors i'll try to post a picture. Rating: 5