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Brown spots on leaves?

Nakleikestarted grow question 3y ago

Hi,7 week from seed..advanced nutrients. I have brown spots on leaves on few plants..what is this..?? And the leaves of one plant started to turn yellow...

Nakleike

Nakleike

Nakleike

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Leaves. Other

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tentcolasanswered grow question 3y ago

Leaf septoria is a possibility. It's a fungi. The last picture looks like the spotted fungi. The first two look like the previous comment about a deficiency could be accurate as well. Cutting away all infected leaves is first step then I would increase air flow and decrease humidity.

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Zurban_Poisonanswered grow question 3y ago

it's a calcium deficiency. which is most likely caused due to low ph. the PH needs to be adjusted to 5.8-6.2 be sure to include calcium and magnesium in the solution. since their absence leads to the devititization of all nutrients. Therefore, the leaves begin to turn yellow ahead of time.

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