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Lighter edges on top leaves

med_hierostarted grow question 4y ago

Why does my plant have lighter edges on top leaves? Is it light stress (i had a weak light very close), defieceny or something else?

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Leaves. Color - Yellow

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Organomananswered grow question 4y ago

I believe this is the first sign of burning from feeding with a cannabis incompatible fertilizer with a strength of 18/18/18, which is waaay too strong in every macro nutrient. For veg you want fertilizers (roughly) around 5/2/5 and for flowering (roughly) around 4/4/6.

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GreenOrganicGermanyanswered grow question 4y ago

Deiner Pflanze fehlt Magnesium! Füge deiner Nährstofflösung etwas calmag hinzu und es wird sich besser. Ich hattee dieses Problem häufig, da wir sehr "weiches" Leitungswasser in meiner Gegend haben. Bei Umkehrosmosewasser ist das auch ein häufiges Problem.

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