I have come across that watering with ice cubes. I tried it once on a noid Phal, but I timed it at the height of our exceedingly hot temps here, like outside temps are onerous 110+ and inside temps are also quite warm, 80's. At that particular timing, it did not harm my plant as the ice is sitting on the media, not on the roots. Somehow it seems to trigger an earlier spike later on, but not sure if that was the direct effect, since I did not try to test it again to compare results. But knowing more of my orchids now, I did not repeat it anymore..just curious if it does work. Gimmick or not, who knows..the more we know the more we improve or avoid stuff. And that orchid is still alive, one of my active growers actually.
I do caution my friends not to do it whenever they ask me about the ice cubes method, especially those who really have no iota of understanding about growing orchids.
