I'm a bit lax when it comes to feeding, but once a month should be ok. Yes, Mine are all in hanging pots...they hang from tree branches in nature, and that's the way they will grow. I never encourage people to grow them as houseplants for that reason. They can be tied upright or grown in tomato cages, I'm told, but that seems like a lot of work. If the Christmas cactus are thriving, the Epis should be happy with them.
