Can anyone tell me if this is a deficiency or exess. We’re at about day 25 a flower this happened in my last grow and i never really got it under control tried flushing adding more cal mag less cal mag. Growing in cocoa using advanced nutrients. the leaf edges turn yellow then crispy brown. Right now it’s only on the handful of random older fan leaves
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Good Morning. I am guessing you have checked your plant for insects. Do you have a fan that is moving your plant leaves? Have you splashed any of your nutrient water on them? I have experienced the same looking leaves because they wiggle on each other from the fan and it makes the leaf look like that. Happy Growing 
