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Stickstoffmangel?
m0useanswered grow question a month ago
Nitrogen tends to work its way from the bottom of the plant and works it way up as its a mobile nutrient. I do not think this is a Nitrogen issue.
The immobile nutrients are the ones that tend to show on new growth. This discoloration could be from S or Fe Or if they are in the mix the PH might be off and they can't take them up.
https://420life.com/wp-content/uploads/2021/10/Marijuana-Leaf-Deficiency-Chart-scaled.jpg
This chat is a nice reference point for diagnosing some basic leaf systems but its sometimes more then one.
Good Luck!
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