In my opinion, Phals are house plants. They resent any changes in light, temps, or humidity. I have experimented with potting medium, and found they do best in a chunky bark mix. They do fine in long fiber spagnum for awhile, but need to be changed when the moss starts breaking down. Our weather has been yoyo this year, and all my orchids have suffered outside, but none as much as the Phals. They like steady intermediate temps, and the heat really made them suffer.
