Lee, thanks for your info on growing Dieramma in Pasadena. I'm in San Jose, about 350 miles to the north, but in an inland area that's sheltered from the ocean breezes. It's not quite as hot here as Pasadena, but far hotter than San Francisco. In my area, Dieramma grows very well here in part shade as long as you give it some summer water. I have some clumps that are over a decade old, and bloom profusely each year. They do not appreciate heavy soil. If I were in a place with high summer heat, I think I'd try them in a spot with a lot of shade in the middle of the day. Hope that helps. Mike San Jose, CA (zone 9, min temp 20F / 6C)