These plants are not even 5 weeks into 12/12. Is your leaves more yellow than these? This is normal for hybrid indica's.

As long as the buds are growing?...I don't sweat the fan leaves being sucked dry of nitrogen.....but, watch the little buds leaves, closely.
Dutch Pimp Reviewed by Dutch Pimp on . nitrogen deficiency help! I have had two plants in a room with a 250 watt hps light on 12/12 for about 4 weeks now. one plants larger leaves are starting to yellow and fall off and the upper stems of the leaves are turning a slight dark purple. sounds like a nitrogen deficiency to me. This is my second grow and I had encountered the same problem last time but never treated it and ended up with a small amount of mold on the buds. I am using shultz concentrated fertilizer 10-15-10. should i be using something different Rating: 5