need to know how my plant is doing, can anyone help

hey my plant is almost 4 month old now and shes growing at a good rate for the setup i have. Using normal soil, with peat moss and perlite. I use a 20-20-20 NPK and ive just started flowering for almost a week now. This my first grow !! The problem I have is drooping nd inward curling leaves other than that everything seems to be ok. OOhh ya i use CFLS and im LSTing my plant. the roots r sticking out of the bottom of the pot, i ahve a feeling it might be rootbound.
its an indoor grow, was just getting some fresh air and sun

Oo where to begin, root bound, over watered and maybe to much Nitrogen as well as to little Mg is my first and best guess