Probably 10 years ago I had a nice bunch of Epiphyllum (white flowered) growing outdoors in a pot hanging from a tree branch to provide filtered light. I'm sketchy on what eventually happened to it--I think I must have left it out all winter and it froze to death. They're great plants though--very easy to grow, and the blooms are spectacular. I'm not sure about the other varieties, but mine was night-blooming, so I'd see the flowers in the morning just before they started to wilt. That red one looks like it will be amazing!