Begonia Rieger

Place it in a cool room that remains dark in the evening, so it will continue to experience short days and long nights. Give it an east- or west-facing window where it will get sunlight for only part of the day. Try to provide temperatures in the high 60s to 70 degrees Fahrenheit during the day and from 50 to 60 F at night. Water the Rieger begonia when the surface of the soil feels dry to the touch.