Grow Mediums Deleted

It's not causing any issues right now, but my temperatures are fluctuating between 79F (Lowest) to 83F (Highest). The average is 81F. Is this too high?
Those temps should be fine, damn near ideal in my books. If you want the best results, check VPD tables to make sure that your RH is good for those temps, and adjust if necessary.
 
It's not causing any issues right now, but my temperatures are fluctuating between 79F (Lowest) to 83F (Highest). The average is 81F. Is this too high?
That is ok. Alot of people run higher temps than that with led's
 
I'm also thinking that the leaf curling may be the Sour Crack's sensitivity to being planted directly into the KIS Soil? Maybe too much nutrients for early life Sour Crack?

I'm waiting for two more nodes to grow before I begin topping and mainlining!
Could also be a bit of light sensitivity. Can you reduce light on that one plant?
 
I can't. I have one spider farmer sf-1000
I ran into a photo at growweedeasy.com that showed identical edge curling to yours:
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The text said that the curling was from too much dry air blowing on the plant. Maybe aim your fan so that less leaf movement happens on the troubled plant. :pighug:
 
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