So, all you living and growing orchids in warm climes are rather lucky when compared to those of use living in the permafreeze zones. The ground temps for well water or piped in water won't descend to the depths of those of us living in the North. Then again, my well water in the summer is nice and COOL, even when the temps hit 90 outside. So, I've got that going for me. For the other three seasons, looks like either a heater is a good idea or a storage tank to bring the water to greenhouse temps would be acceptable.
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