Can anyone tell me how to get a mature jade plant to bloom? I recently had a disagreement with a friend about how to get one to bloom. I've read that they need the shortened days of fall and winter, without supplemental light. Like an unlit sun room. Also that one needs to drastically decrease watering, and a period of coolness helps. Well, an acquaintance says that only the decreased watering is necessary. As I haven't gotten mine to bloom yet, I'm not really sure what to believe. I would appreciate any advice.