I'm more and more convinced that temperature is the key. I can grow phals in my temps, but trying to switch their medium is a struggle, and I have to use medium that will not cool them down even further.
A heat mat does help for a struggling one or two, but much as I love my orchids I'm not willing to spend more on heating the whole house. I feel comfortable at 67 so that's what they get when I'm awake and in the house, and a bit cooler when I'm asleep or out. We're actually having a bit of an "Indian Summer" just now and the house is naturally staying about 68 all the time... but I'm sure that will change soon
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