Unknown problem, please check it out

Do you recognize the deficiencies on these leaves? The curling occurs at the base of the blades. Leaves are dry and dull colored. Calcium / magnesium? Fungus? Something else?

I just had that problem and mine was nitrogen. I'm soooooo new though so don't listen to me

And my lights was to close so it was burning my leaves too just real slow

Unknown problem,

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No its quite well known, its too hot ,cool it down dope grown indoor hate temps over 80 , they get yellow and stunted and its hard to bring them back. Major heat problem ^^ .

Do any nutrient deficiencies contribute to this behavior? Or over nuting? Or fungi? It doesnt get all that hot in veg - 83 tops. I will see what i can do to remove heat though, thank you.

heat stress/underwater

Radiant heat is different that just ambient room temp. I have had heat stress with temps in the low 70's. It causes leaf margins folding in or "tacoing", leaf tips curling upward, chlorosis (bleaching), necrosis (brittle leaves). It is usually most apparent with the uppermost leaves and leaves most exposed to the light.


Imagine a blacktop parking lot on a bright sunny 80f summer day. You can be sure that surface is hotter than 80. That is radiant heat and the blacktop is your leaves.

This type of heat stress can cause to plant to "shut down" and stop feeding. This results in what looks like nutrient deficiencies which people attempt to fix by feeding which compounds the problem.

Great analogy MYOB,
OP
What kind of light do you use ?