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I forget where you're suppose to check the plants temperature, but if its below 30, underside of leaf, it will be fine I'd assume, the bigger leaves that are near the top will provide shade for the under side

The temperature is 100° today, the plants hold up to the heat. I lost plants due to misdiagnosis, thinking UV damage was a sign of overwatering. Sativa is more sensitive to UV than afghan. Just have to keep things in balance and learn.