One thing I found, in this wood heated house, is that temperature plays a big part in the flowering. If it is cool in the office, I get flowers multiple times a year. If not, then just once or maybe twice.

My plant I got at a tag sale, maybe 20 years ago or more. It was a daughter of the original plant and that one was very old, the tag sale person said. The one I bought has never flowered. A daughter I planted from it is the one that flowers a lot.