SPCKushanswered grow question 6 months ago Hey my plants have the same symptoms, but I know my soil is super hot, so it's definitely not deficiency. In my experience, this happens during rapid growth especially during preflower stretch especially in Autos! I think that the growth out paces the nutrient flow and so as long as older leaves are fine with very little to no yellow tips,then you are doing great so far!! Happy Growing!!!