just by looking at the plant it appears to be stretchy which tell me a few things right off the bat not enough lighting to begin with drooping can be a number of things from root binding, to over and underwatering , soil to hot , soil to compact not allowing gas exchange just so many variables its not even funny
Also from looking at plants it appears leafs are not overly green this could be due to a number of things one being not enough ferts , Ph being out of wack
so really what is the op's choices
diagnosing any plant issue should go as follows
did i change anything to my growing ???
what is my ph of medium
does medium have enough drainage ( perlite etc
does my medium stay wet for to long
is my environment in in right range temps , RH
and most importantly do i have enough wattage per Sq foot