Mine aren't setting buds yet, being much warmer here still. Generally they start setting buds in November, and are in bloom by Christmas. This is my plant that I started from cuttings, from a plant that had been passed on from generation to generation, and was over 100 years old. It is the true Christmas Cactus. I placed it outside the beginning of October, so it will start getting the longer, cooler, darker nights, that seem to help it set buds.