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Yellowing lower fan leaves, a few red stems; N/Mg deficiency or normal low leaf die-off?

tiny_couchstarted grow question 5y ago

Is this a Mg or N deficiency or are these leaves naturally dying off? Showing on only one of two plants so far. Appears only on lowest fan leaves. F20, 7L pots BioBizz AllMix and nutes (1mL/L Grow and 2mL/L Bloom). Temp/RH are good. Can't measure pH. Local soft tap water 7-8pH.

tiny_couch

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Leaves. Edges burnt

Leaves. Color - Yellow

Plant. Stem - Red or purple

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Esoteric_growinganswered grow question 5y ago

That level of feed for bio Bizz is spot on, I am almost 100% that’s only a magnesium problem. I add about 0.75 to 1ml per lite cal mag and you will be flying again in no time.

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