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Early Sign of bud rot on main cola?

banjo
banjostarted grow question 5y ago
I had just a few short yellow leaves on my main cola that were easily pulled off and brown at the base. Pictura attached. Airflow good on the plants outdoors but it has been hot and humid. Is this bud rot? If so what should I do?
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Buds. Other
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Barbieslapping808s
Barbieslapping808sanswered grow question 5y ago
how did it evolve?
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The8thChevron
The8thChevronanswered grow question 5y ago
Really can't tell. Keep a close eye on it. My guess would be a calmag deficiency caused by too much P and K. If you've noticed rust spots on any larger leaves, this could confirm.
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banjo
banjoanswered grow question 5y ago
Any ideas? I can't find any big obvious spots of mold but the brown bottom of the leaves after pulling out worries me
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