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- Dabs of Rosin.
Us valley growers face the other end of the spectrum with most summer days 100°F+ and 20% humidity outdoors. My house is artificially humidified ~55% H with a Swamp Cooler (evaporative cooler) It can get up to 70%+ in the grow room. High heat + High Humidity = Sativa. The talk about the new DP auto is so tempting.On a good year 65%+, on a harsh year 70%+ nearly constant during mid-late summer. Catch a bit of a break usually if a cold front moves in, but usually its hot and hot brings rough humidity