Can anyone tell me what these spots are..everything was going well untill I put the dimmer up on my light to 700 par on the canopy then the leaves went like this and more and more cars turning everyday...can anyone tell me what might be wrong? Thanks
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What is the pH and PPM of the soil runoff?
Keep an eye on your v.p.d. Look that up if your not sure what it is. If your humidity and temps are not in line your v.p.d could be off and if your plant is transpiring more than ideal amounts you could be getting toxic nutrient buildup. Just an idea. Good Growing.
I wouldn't worry about it, sometimes they just get some bad leaves. Just because you might have some spots or a yellow leaf here or there its not really a big deal. I would just keep an eye and make sure it doesn't get worse, otherwise enjoy them pretty girls and nice job!
I don't think that's nute burn. The closest thing I've found that looks like that is a copper deficiency possibly caused by PH issues? .... just a wild guess. Here's an article on it, the same site also has info on other deficiencies.
https://www.growweedeasy.com/cannabis-plant-problems/copper-deficiency
No. Light burn is more even. Looks to be some sort of deficientcy, or burn from sprays or water left on the leaves in a wet environment.