Nute burn or Potassium defeciency

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Sam1510

Well-Known Member
So my leaves are dying off pretty quick. I'm pretty sure it's one or the other the crazy thing is I'm growing 7 different strains and it's my blue cookies showing this the most. There is some similiar spots on some of the other leaves on other strains but it isn't as bad as my cookies. What do you guys think? The last pic is a different plant the first 2 are the blue cookies that's getting it the worse
 

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Kassiopeija

Kassiopeija

Well-Known Member
I would flush the pots of the plants from the first 2 pics with rainwater, especially on the first pic you see the excess nutes burning the tips of (newer) leaves and turning them darkly green with a slight metallic shine. Don't expect that the older leaves recover.

I take it the 3rd pic is more from the bottom or medium of the plant? Then such yellow fan leaves are normal, especially if they don't get full lights. Once the leave wrinkles and dies, remove them so they don't keep light away from the budsites.
 
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Sam1510

Well-Known Member
The second pic of from a different plant! It's crazy because the first plant did this at about week 2-3 of flower but I upped the nutes and it stopped. But now it's doing it again I think it's a K defeciency because I haven't feed nutes in 3 days and this showed up when my lights turned on today.
Kassiopeija said:
I would flush the pots of the plants from the first 2 pics with rainwater, especially on the first pic you see the excess nutes burning the tips of (newer) leaves and turning them darkly green with a slight metallic shine. Don't expect that the older leaves recover.

I take it the 3rd pic is more from the bottom or medium of the plant? Then such yellow fan leaves are normal, especially if they don't get full lights. Once the leave wrinkles and dies, remove them so they don't keep light away from the budsites.
Click to expand...
 
Grenier5413

Grenier5413

Well-Known Member
I believe with k deficiency your leaves will brown way back farther than with nutrient burn. My guess is your on the money. I also believe that k deficiency can also occur with late stage Cal mag deficiency and also environmental stress. Particular high heat. That's been my experience anyways.
 
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djburns1

Well-Known Member
how many weeks have they been in flower
ALSO every strain will have different ph and nute requirements through the grow
pay attention to ph and use the least amount of nutes you can to see results. if you're growing in soil it wont straighten out before the buds are ready anyway
 
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