This is my 3rd grow with the same problem

I read threads. Uncle Ben's sticky thread somewhat answered my question i think? I have a kandy kush, white widow, and pineapple express going right now. I had Kandy Kush the last 3 grows with this same problem. My plants are doing excellent till about 2 months into growing. This grow it showed now, which is the first week of flowering. The leaves starting at the bottom discolor and dry up i'd say. I am using subcools super soil that is not the revised version. I didn't see the revised version till after i made that batch awhile ago. I'm almost positive it's overfertilization. am i correct? If so could i leach them without draining all the nutes out? Thanks for the help.

can you post pics??

well maybe that is nitrogen deaf,but anyways you don't need lower growth...you can always flush it and then restart nutes schedule