Begonias, like Peace Lilies, tend to bloom more often in u003ca href=u0022http://houseplant411.com/glossary/light-for-houseplants-highu0022u003ebright lightu003c/au003e and when under a little stress. Move your Begonia Plant to brighter location, cut back on your u003ca href=u0022http://houseplant411.com/glossary/fertilizer-for-plantsu0022u003efertilizeru003c/au003e, and allow the soil dry out a bit more. This should encourage your Begonia Plant to produce more flowers.