Check out the Cultivation info tab in the site above, Ken. Maximum temps recommended not above 25deg. C which is 77deg. F with an occasional bump to 30deg. C (85F) tolerated. These orchids grow happily in the Pac. Northwest, with winter protection. The guy with the site grows them in a cool greenhouse in England.
The other down side I felt with Pleiones is that the flowers bloom before the leaves come along, for the most part, and don't last very long. They're gorgeous flowers but that's a lot of work for a very fleeting bloom, once a year.
