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What would you say this is??

  • Thread starter Thread starter Doublekush
  • Start date Start date Mar 28, 2025
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What would you say this is??

Doublekush Mar 28, 2025 22 Replies 1,966 Views
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Doublekush

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#1
We’re on week 5 flowering, I see a couple of leaves looking like this

On first glance what would you say the cause of yellowing is on the outside of the leaves?

Thanks in advance
 

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ArtfulCodger

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#2
My first guess is over-feeding, based on dark green leaves with burned tips, and the burn running down the edges.
 
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Doublekush

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#3
ArtfulCodger said:
My first guess is over-feeding, based on dark green leaves with burned tips, and the burn running down the edges.
Click to expand...
Thanks mate, over feeding as in too regular? Too much nutrients? Or Too much water at one time?
 
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ArtfulCodger

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#4
Doublekush said:
Thanks mate, over feeding as in too regular? Too much nutrients? Or Too much water at one time?
Click to expand...
Tough to say without knowing what you've been doing, but tip and edge burn are consistent with a situation where there's too much salt in the pots, which causes water to flow out of the plants instead of into them, dehydrating the tips, and then the edges. A ppm/EC measurement on your runoff would help confirm if that's the case (or not).
 
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Smokey0418

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#5
Doublekush said:
We’re on week 5 flowering, I see a couple of leaves looking like this

On first glance what would you say the cause of yellowing is on the outside of the leaves?

Thanks in advance
Click to expand...
They look similar to mine .

What happened to me was I watered with just Ro water one time till run off . Right after I stared getting yellowing around perimeter of leaves.
About the same timeframe
 
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Doublekush

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#6
Smokey0418 said:
They look similar to mine .

What happened to me was I watered with just Ro water one time till run off . Right after I stared getting yellowing around perimeter of leaves.
About the same timeframe
Click to expand...
So in your opinion this could be a lack of nutrients? The only thing it could be lacking is either cal mag or nitrogen but I’ve been microdosing them during the flowering stage with heavy P and K.

My first thought would be too much bloom nutes or too much nitrogen but I don’t believe I’ve gave it too much nitrogen
 
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Smokey0418

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#7
In my case yes I believe my feed was washed away causing the damage.


 
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Doublekush

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#8
I believe mine may be a different problem to yours my friend. The tips of my leaves are still fresh looking even though they’re yellow where as you’d has what looks like burnt leaf tips

I had a similar looking problem to yours in my first grow which I believe to be either lack of cal mag or over feeding it.
 
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Doublekush

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#9
Doublekush said:
I believe mine may be a different problem to yours my friend. The tips of my leaves are still fresh looking even though they’re yellow where as you’d has what looks like burnt leaf tips

I had a similar looking problem to yours in my first grow which I believe to be either lack of cal mag or over feeding it.
Click to expand...
There’s picture on my profile of it
 
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RootFarmer

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#10
K deficiency most likely.
 
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Gmix

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#11
ArtfulCodger said:
My first guess is over-feeding, based on dark green leaves with burned tips, and the burn running down the edges.
Click to expand...
^ knows what he’s talking about
 
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Grownsince95

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#12
Looks like too much N is causing K problems. The two are directly related and I see signs of both on your leaves. N needs K to be metabolized and the excess N basically hogs all the K in the plant.

The key here is to reduce N not add K though because that will solve both issues.

Hope this helps and keep us posted!
 
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fritzthecat

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#13
Hejo

Probably light burn:

Fix Curling or Clawing Cannabis Leaves | Grow Weed Easy

Learn about the various things that cause cannabis leaf curling or clawing, and get the solutions!
www.growweedeasy.com

Nutrience could be also... probably
 
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brokencage

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#14
fritzthecat said:
Hejo

Probably light burn:

Fix Curling or Clawing Cannabis Leaves | Grow Weed Easy

Learn about the various things that cause cannabis leaf curling or clawing, and get the solutions!
www.growweedeasy.com

Nutrience could be also... probably
Click to expand...
This. light burn, ease up a bit
 
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RootFarmer

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#15
This might help

 
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Doublekush

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#16
What makes you think this? I believe it’ll be versed on K
Grownsince95 said:
Looks like too much N is causing K problems. The two are directly related and I see signs of both on your leaves. N needs K to be metabolized and the excess N basically hogs all the K in the plant.

The key here is to reduce N not add K though because that will solve both issues.

Hope this helps and keep us posted!
Click to expand...
thanks mate this is helpful knowledge
 
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Doublekush

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#17
fritzthecat said:
Hejo

Probably light burn:

Fix Curling or Clawing Cannabis Leaves | Grow Weed Easy

Learn about the various things that cause cannabis leaf curling or clawing, and get the solutions!
www.growweedeasy.com

Nutrience could be also... probably
Click to expand...
See, I don’t think it’s light burn. More likely to be a nutrient thing I believe
 
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Doublekush

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#18
RootFarmer said:
This might help

View attachment 2404911View attachment 2404912
Click to expand...
Thank man this is really what I’ve needed!
 
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Doublekush

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#19
So after being out and about I noticed due to an electrical issue the flowering ladies have had about 24hr darkness

What will the plants reaction be to this? @Gmix @ArtfulCodger @RootFarmer
 
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ArtfulCodger

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#20
Doublekush said:
So after being out and about I noticed due to an electrical issue the flowering ladies have had about 24hr darkness

What will the plants reaction be to this? @Gmix @ArtfulCodger @RootFarmer
Click to expand...
Too much darkness isn't a problem in flower. Get it back on schedule and it should be fine.
 
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Replies 22
Views 1,966
Started Mar 28, 2025
Latest post Apr 15, 2025
Starter Doublekush
Forum Cannabis Infirmary

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