I have a problem and I’m hoping someone can help. I started over several times because I thought I had the tobacco mosaic virus but my problem keeps occurring. I used several different strains with new soilless medium and I sterilized everything. I’m starting to think it must be something else that is causing the problem. The problem is usually noticed in the grow stage near the top of the plant and it starts on the new growth. The new growth stops growing and it starts turning a light but dull greenish yellow with contorted as well as thin shaped leaves. The problem moves towards the bigger leaves near the affect new growth and starts turning them a pale dull green color. The leaf margins fringe upward while some leaves show a few white lines here and there. The white lines look like lines of stress within the leaf. The roots look nice and healthy. I use grow big, big bloom, liquid karma, humic acid 15%, dry maxi-crop and cal-mag. PH: 6.0. Climate: 74 degrees 50-60% humidity and pro-mix HP. 600 watt metal halide is 2 feet above top of plants. What could be the problem, what is it that I’m missing?
