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Why are top leaves yellowing? 4th week of flower

Embarrassed_Corgi_64started grow question 1h ago

Why are the top leaves yellowing but not the bottom leaves? Overwatering, pH lockout, deficiency, light stress?

Embarrassed_Corgi_64

Embarrassed_Corgi_64

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Leaves. Color - Yellow

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John_Krameranswered grow question 23m ago

CalMag issue the front one has Mg excess and Ca lock the one at back contrariwise due to this u have also P,K problem

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ibbzyanswered grow question 1h ago

Raise your lights or dim them, looks like like light stress

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