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Necrotic spots appear overnight on fan leaves.
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Necrotic spots appear overnight on fan leaves.
We just started using CO2 and sprayed a citric acid/bicarbonate mixture near the time these spots appeared. We turned the lights off and sprayed before end of day then left the lights off until morning. CO2 isn’t over 1000ppm and VPD is spot on 1.1 to 1.5. This is the second time under same circumstances of spraying and new CO2
My thoughts; spray damage (even with lights off) or calcium deficiency due to increased CO2. Any info would be appreciated.
Thanks,
Rob
Bad River
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6 Replies
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You are correct. They don’t like what you’re spraying.
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Thank you. Kinda what I was thinking.
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Happy to help. When the spots are white like that it’s usually a burn vs necrosis. Hope they recover fast and rock out for you!
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Thats kinda what I was thinking, seems to be strain and plant size (just up-potted) specific.
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These leaves are not necrotic. Root rot or leaf septoria cause that. CO2 and mineral nutrition also have nothing to do with this physical damage. The citric acid you sprayed on them burned them. Don’t ever spray citric acid on plants.
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Thank you. Good advice.
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