Difficult to say for sure with out seeing more of the plant. Is it all over uniformly? Older fan leaves?
Did you apply anything to the leaves?
I ask because these spots could be an indicator of pests, which could be causing issues with the leaves the older they get.
What do you think I should do about the potential pests? I don’t see any bugs on the plants. They are being grown indoors in a grow tent, in a sealed attic.
At first I thought it was White Powdery Mildew and it might be that. But when I touch the leaves, I can’t feel anything different on the surface. It also started showing up around the time I started giving them the Flowertime Fertlizer (16-6-30). I wonder if its the precursor to the nutrient burn spots already discussed.
@Fieldofdreams This has to be it. I misread the chart thinking I should feed them every time I have watered them. So, I’m feeding 2x (ish) as much as they should have been fed. I’ll watch the white dots but I think I’ll lay off the feeding for a week or two and see what happens. I wonder if I should wait longer.
I have 3 feminized Goldleafs that are in the flowering stage but haven’t shown any nutrient burn. That said, I haven’t been feeding them as long as the autos.