Brighten shaded to partially shaded areas with easy-to-grow begonias. These tender tubers (often called bulbs) are favorites for hanging baskets and containers. They also look great edging a walkway or in mixed flowerbeds. You'll want to plant them where visitors can admire their colorful, showy flowers. Begonias are not cold hardy and can be planted in the ground after danger of spring frost has passed—or they can be started indoors. They thrive in well-drained soil and don't care for direct afternoon sunlight. When selecting begonia bulbs to buy online, take into account their mature height and spread, habit (some cascade) and flower color.