The Rieger begonia is a type of tuberous begonia that is hardy outdoors only in very warm areas, and is grown as a houseplant in regions where winter temperatures reach below 35 degrees Fahrenheit. It grows 3 double-rose-shaped flowers at the end of each stem, and is also called the winter begonia because it blooms during times when daylight periods are short. Cutting your Rieger begonia back properly is a good way to encourage it to re-flower once it has become dormant.
Rieger begonias flourish in bright, indirect sunlight, such as in an east-facing window.
The Rieger begonia is healthiest in a non-humid location.
Rieger begonias grow well in well-drained African violet potting soil.
When the plant is actively growing, use ½-strength houseplant fertilizer every 2 weeks.
Keep this plant out of direct sunlight, which will scorch its leaves.
Do not get water on the leaves—this can encourage mildew growth.