Leaf curl/twist and spots

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SteakBags

Well-Known Member
What could this be? Leaf curling on the edges and the leaves twisting overall, also some kind of spot

In roots organics lush, could this be root problems? I’m currently waiting for them to dry out, I feel I may have overwatered. These things don’t wanna dry though, they’re taking forever to droop
 

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BlandMeow

BlandMeow

Well-Known Member
Is that from you observing the hygrometers or do you have data points on that? High vpd can cause some issues with leaf twisting and curling. By allowing the humidity to go lower, you are raising the vpd. Not sure if that is it or not, but you want to keep vpd in the optimal range.
 
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SteakBags

Well-Known Member
Observing hygrometers at canopy level, and also on the floor at root level. I’ve also taken readings with an IR gun and leaf temps are usually 1-2 degrees F below room temp. @BlandMeow
 
BlandMeow

BlandMeow

Well-Known Member
I use this page for a resource and I have readings over a 24 hour period to know night vs day vpd.

vpdchart.com

VPD Chart

Vapor pressure deficit (VPD) chart & calculator for horticulture in controlled environment. Cannabis, tomatoes, leafy greens, cucumber.
vpdchart.com vpdchart.com
 
BlandMeow

BlandMeow

Well-Known Member
Like I said, not sure if that could be part of the issue. Why do you have the light that far away and dimmed? At this age of growth I would think you could turn that up some.
 
drsaltzman

drsaltzman

Well-Known Member
Just let them be.
There's nothing noticeably wrong. They look fine.
Leaves twist. Then they untwist. Plants don't grow perfectly every time. Same for the "spot". It's nothing.
You start chasing the cause for twisting leaves you're gonna cause a problem when you currently have none.
Agree with BlandMeow, you can up the light. 20% at 48" is for seedlings and tiny plants.
 
visajoe1

visajoe1

Well-Known Member
drsaltzman said:
Just let them be.
There's nothing noticeably wrong. They look fine.
Leaves twist. Then they untwist. Plants don't grow perfectly every time. Same for the "spot". It's nothing.
You start chasing the cause for twisting leaves you're gonna cause a problem when you currently have none.
Agree with BlandMeow, you can up the light. 20% at 48" is for seedlings and tiny plants.
Click to expand...
Well said. Agree 100%
 
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SteakBags

Well-Known Member
BlandMeow said:
Like I said, not sure if that could be part of the issue. Why do you have the light that far away and dimmed? At this age of growth I would think you could turn that up some.
Click to expand...
drsaltzman said:
Just let them be.
There's nothing noticeably wrong. They look fine.
Leaves twist. Then they untwist. Plants don't grow perfectly every time. Same for the "spot". It's nothing.
You start chasing the cause for twisting leaves you're gonna cause a problem when you currently have none.
Agree with BlandMeow, you can up the light. 20% at 48" is for seedlings and tiny plants.
Click to expand...
The lights were at 50% at 36”, the curling of the leaves was worse (I’ll attach a pic) …so I raised and dimmed to where it is now and it all got much better but not completely

The growth is soooo slow
 

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drsaltzman

drsaltzman

Well-Known Member
SteakBags said:
The lights were at 50% at 36”, the curling of the leaves was worse (I’ll attach a pic) …so I raised and dimmed to where it is now and it all got much better but not completely

The growth is soooo slow
Click to expand...
They also could just be starting to come out of it regardless of light.
Whatever you decide is up to you but one of the benefits of a dimmable LED is the ability to keep the lights close.
I do not see anything alarming with your grow. They’ll be fine if not already getting ready to bust out.
Don’t mess with it too much.
 
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