The jade plant is one of the easiest houseplants to grow and is nearly indestructible, making it perfect for beginning and hobbyist growers. While the plant thrives with very little care for decades, it takes a lot of care to make a jade plant flower in mid-winter. While encouraging an established jade to flower can be as simple as controlling the environment, the willingness of the jade to flower is up to the plant.
Move the jade in mid-autumn to an area of your home where it will receive four hours of bright, filtered daylight each day, preferably in the mornings. This area needs to be in complete darkness during the night and free of any artificial light as uninterrupted long periods of darkness are necessary.
Cut back on watering from weekly to only once or twice a month. You don't want the plant to go completely dry with the leaves shriveling up, but do allow the plant to experience drier soil that isn't saturated often.
Stop fertilizing your plant from mid-autumn to early spring since leaf growth will not be active during the winter.
Cut back your thermostat for the room your jade is in and allow the air around the plant to become cold. The nighttime temperatures can be as low as 32 degrees Fahrenheit, if possible, without fear of killing off the plant.
Repeat this process each year to keep your plant in a natural cycle of warmth during summer and cool nights in the winter. With luck, your plant may bloom every year, but such results aren't typical.