Need feed back please Leaves curling

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Norcalbay

Member
]Got some xj13 here and some other test clones . I noticed the leaves curling upward. Not sure if it's from the fan blowing strong closely (on low level) or the temp that moves from 60-72 or even from nutes .
Using 3 step GH flood and drain on coco under 2 600w in gallon pots
 

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Native Humboldt

Well-Known Member
I had a few last time that had the leaves curling up like yours. I found through research that it could be a PH problem so I lowered my PH from 6.5 to 6. It didn't fix the problem tied everything and it turned out the fan were blowing on them too much. I raised the fan up a few inches, removed the curled leaves and the problem went away. Good luck
 
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