well i dont think it is to much nutrients because i only put in half the requiered dose maybe that was even to much but i dont think so the pure blend formula im using can be found at www.paradigmgardens.com it is a flower formula we sexed these for a week 12/12 seem that all left are females . 9 females exactly we decided to just let them keep flowering is that ok for them at that height i think it is . I honeslty think it is the magnesium def. myself but in 35 days or whatever they have been transplanted 3 times could that have an effect also ??there will be no more transplanting through out the rest of the grow on these females . most of them look good just a few are yellowing