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Upper leaf
gogocrackstarted grow question 3 years ago
Although the general condition of the plant looks good, some upper leaves started to claw. I would like to get expert opinion on the cause and solution of this.
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Leaves. Curl up
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SeedlockHolmesanswered grow question 3 years ago
They don't look that dark green for a nitrogen toxicity but it could be it.
Do you have your clip fans pointing at the upper canopy?
Wind burn does that clawing too.
GanjaReaperanswered grow question 3 years ago
Hey Gogocrack,
This are the first signs of (n)itrogen toxicity, not mayor yet but it is there.
You also have a little bit yellow tips, normaly people will go for overfeeding but since you have low PPM/EC this is not the case.
With a Nitrogen toxicity your leafs will start getting yellow tips as well and start to claw.
Flush your plants a bit and lower your PH.
You use ph 6.7 which is in my opinion a little bit to high, try 6.3-6.4 instead.
Goodluck farming :)
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