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Looks like partial albinism or light bleaching, imo.
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Possibly over fed causing scale build up leading to ph issues or improper npk ratios due to feed or flushing issues.doesnt look like vpd issues but still possible
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Is issue only at top of canopy?
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Hi @professor. Welcome to GN. How many weeks into flower are you? Have you tested the pH of your water and runoff?
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looks like a light (burn) issue or a ph issue
1 Like