Leaves curling up
JohnnyBlazestarted grow question 6y ago
Good Morning everyone i have a problem with my Northern lights today its day 14 and her leaves are curling up is it a normal deformation or something serious ? thanks in advance to everyone that answers.
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Bloombusteranswered grow question 6y ago
Bro, it's a lack of humidity and spot heating on the leaf at 29 degrees and above. I noticed a similar phenomenon when testing mixed spectrum matrices (raspberry, pink color) where there were IR LEDs. When using focusing lenses on young plants, this was observed. During flowering, the curling isn't as noticeable, but it's definitely stress - light, temperature - most likely. In the vegetative stage, using not very powerful lamps 6400-3500k without IR diodes didn't cause leaf curling.
OutForRealanswered grow question 6y ago
In your case it’s seems that it’s a lack of humidity as your level is only 55%.
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