I am days from harvest and just noticed this today. What is going on?
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So zero reason to worry about it
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Yea… either finishing up and not wanting light anymore or just something that pheno/geno does at that point in its life…
I have a few different strains that taco up at the end… some usually have starfighter in them somewhere
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I would like to know what is going on for knowledge…
Obviously I won’t be addressing the situation, I what to know - what is it - what causes it - what helps it.
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Fan leaves are dying because your blooming
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I did just gave them more light… Hmm.
Should I turn it down or let them burn for a day or ?
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Cupping may be because lamps are too close, it’s too hot for them and they cup so leaves have less surface exposed and maintain humidity. Last days they need less light for their senescence, like it was end of summer and beginning of autumn … 
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Yeah, I forgot that I turned the light up… I know it is taboo…
Could I call you?
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Everything is slowing down , now less drinking equals less feeding , so they can’t cool down as effectively or process the light they once could , so they cupping to avoid direct light on them leafs / protecting them etc : )
So dim lights ( lowering light intensity and heat ) save on electric and protect them terps : )
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Just raise your lights a little, as George stated it’s suffering from heat…….
You can also help it by directing a fan between the tips under the light and the light itself.
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I think you pushed your nutes to the limits without burning them, I did that a lot back in the day…I love it and it looks great to me…
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