I am using recommended Cal-Mag but this has been an ongoing problem. Mainly on older leaves. Any ideas?

Nutrients
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What’s your soil pH and ppms?

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ph 6.5 I don’t know ppm

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Once damage has occurred they don’t recover does it keep happening or is it the old leaves

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Is the pH 6.5 your soil pH via slurry test, runoff pH, or what you’re putting in?