you should lighten up with the water at the last couple of weeks. have you foliage fed yet? try giving it straight water in the soil and nutes spray the leafs. This will clean out your soil a little and you can get more nutes in the leafs. the roots tend to weaken after a few months so let them rest a little.
Is it still ok to follar feed when I am in flowering and only a month or so from harvest!?