My poor Christmas cactus is so neglected I am always amazed when it produces flowers. I have one that the landlady from our first place gave us nearly 28 years ago, and it just doesn't give up and let me tell you it has every right to throw in the towel. It hardly ever gets watered, it is in a pot on the floor and the grandpuppies and/or grandchildren nearly knock it flying every time they are over, but it just seems to endure the torture. Good thing there isn't a society that monitors the humane treatment of houseplants, I would be in deep trouble.