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What causes leaf ridges to curl upward?

  • Thread starter Thread starter Garbage_bear
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What causes leaf ridges to curl upward?

Garbage_bear 9 Replies 1,842 Views
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Garbage_bear

Garbage_bear

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#1
What causes this? This is a Jack In Fox farm bush doctor coco under LEDs. These will be going in my greenhouse for a living soil grow.

I always thought heat causes this, the leaf curling up. Is that correct?
 

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#2
My first guess would have been too much light, but heat could play a role too.
 
#4
Garbage_bear said:
What causes this? This is a Jack In Fox farm bush doctor coco under LEDs. These will be going in my greenhouse for a living soil grow.

I always thought heat causes this, the leaf curling up. Is that correct?
Click to expand...
I tend to overheat my canopy a lot. Leaf curl is first sign my gals show and tip burn follows. Sometimes my room feels good but i check my canopy temp and its 90 😮‍💨. I vote leaf temperature.
 
#5
Probably not your issue but I get that from my T5's when they're MORE than a few inches away from the light. so not enough light in my case.
 
#6
I got this curling on a couple of new plants in the dome. Not exactly sure why. Temp and humidity was on the high side 78-81F and 70RH. But also ran close to the LED strips. Building a dome riser for two in the oven right now.

Disappeared on new growth after transplanting to the tent.
 

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#7
Budclarkson said:
I got this curling on a couple of new plants in the dome. Not exactly sure why. Temp and humidity was on the high side 78-81F and 70RH. But also ran close to the LED strips. Building a dome riser for two in the oven right now.

Disappeared on new growth after transplanting to the tent.
Click to expand...
This seedling is different it could be caused by hot Seoul as well -
 
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