Several hours of winter sun are beneficial. Keep soil evenly moist, allowing it to dry only slightly between waterings. Always avoid wet or waterlogged soil. When plant is in full growth, fertilize with balanced liquid fertilizer at half strength at alternate waterings. Never allow plants to sit in a saucer of water.
Begonias tend to be leggy.
Pinch the tip of branches to promote lateral growth. Begonias growing indoors should be moved to a partly sunny location outdoors during the summer. Some begonias do not tolerate direct sunlight and should be placed in the shade. More information on moving plants indoors and outdoors is available in Indoor Plants - Moving Plants Indoors and Outdoors , HGIC 1454. Most foliage begonias grow from thick rhizomes that grow along or just beneath the soil surface.