These plants 12/12 was initiated august 17th. I'm using a peat moss/compost/per lite soil mix with added dolomite lime and blood meal. Ph measures between 6.1 and 6.3 from the 3 plants and they are all exhibiting similar symptoms. Transplanted from 1.5 gal pots to 5 gal pots 2 weeks ago and I have been using Advanced nutrients micro-grow-bloom at reccomended levels for about 3 weeks since I switched from cfl to HPS lighting. Now to the problem. Growth has exploded since being moved under the hps. Temps range from 75-86 rh 40-57% and all new growth looks healthy. But, the lower fan leaves have continued to yellow and shrivel up. I know this is normal in late flowering but its been happening since I initiated flowering. Could it be a nitrogen deficiency or possibly a nute lock out? Any help would ease my mind. And this is my second grow.
Sorry, I'm also using a 400w cool tube with a 240 cfm exhaust fan and passive intake with an oscilatting tower fan and another clip on fan pushing around air at the top of the tent. Here's a pic of the setup.