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Kolibristarted grow question 4y ago

Where do the spots on the older leaves come from and what can I do about it before it spreads?

Kolibri

Kolibri

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Organomananswered grow question 4y ago

Calcium deficiency. Add some Cal/Mag to your fertilizer line up, or if using it already, increase the dosage. Affected leaves won't recover, but new growth should mainly be fine once this is done.

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