Quote Originally Posted by Treez81
I'm pretty much a beginner, but my plants looked almost the same with rusty spots on them, and it turned out being a mag def. Your leaves are curling in also it looks.
See.... Im with you on this one, but I've been using the same exact Nutrient mixture for over a year now. The only thing I changed was that I added Dutch Master's Zone, to get rid of unwanted bacteria in the growing medium. But I've also added it to my hydro system thats in a different location and that plants are doing great.

So in all, I'm left to believe that its something airborne. It could be the temperature, but thats the only other possibility. But even with that, the temps weren't that far off to begin with.

Also keep in mind that these plants have been vegging for about 3 months now and have been transferred between 3 different locations. We cant flip the lights to flower or even bring anymore plants into the grow area until we have this issue under control. Sucks.