Oldest leaves turning yellow

Waveformstarted grow question 2y ago

What could be the cause of oldest leaves turning spotty yellow on 3 week old plants? They got nutritients end of last week for the first time, but not that much.

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Leaves. Color - Yellow

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Krisisanswered grow question 2y ago

Looks like there’s yellowing in between the veins of the leaf to me. That or the lights making it look that way. Anyhow that’d be magnesium deficien

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jeejeanswered grow question 2y ago

I cant see the whole plant, but from the picture it looks like nitrogen deficiency.

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