copper dust

Dalton, GA(Zone 7b)

I have an organic copper dust that says not to apply it when the temperature is >85 degrees. Does this mean I just need to apply it in the evening when temps. are cooler, or does it mean I cannot use it in the summer as temperatures are >85 degrees everyday?

Thanks,
Becky

Durhamville, NY(Zone 5b)

Have you tried calling the manufacturer?

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