Brown spots on leaves

Kenderbetyarstarted grow question 5y ago

I've noticed a few brown spots on the main cola's leaves. The rest of the leaves are looking normal. What could cause that?

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Leaves. Color - Dark-brown

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Ianc427answered grow question 5y ago

I’m going through the same thing at moment , tried to get help but no one answers me on the questions endless

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JesusChristanswered grow question 5y ago

Sorry it may be Calcium and or Magnesium. Supplement with CalMag 1 ml per litre of water add before base Nutrients

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JesusChristanswered grow question 5y ago

Calcium deficiency use calcium magnesium. Could be boron but that usually has twisted leaves and starts at the tips and is rare

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