The nutes are more than likely time realease, which this means every time you water it,it realeases more nutes thats in the soil the cat claws are a def,sign on nute burn.I would like to know the ph and ppm of the run off?After looking at the pics it looks like you locked out some of the nutes due to high or low PH.You have more than 1 problem,i would flushem good and due my measurements of PH and PPM on run off.If you plans are mothers i would take a clone in a another week to see sex and use a different soil on it.But that only depends how they do after the flush.