Angel Wing begonias are a good example of this group. Rex begonias are an example of a rhizomatous type. Although they do bloom, rhizomatous begonias are prized for their incredible painted leaves, often in startling colors and patterns. To select a healthy begonia, look for full plants with signs of new growth and some mature leaves so you can see what it will look like as it grows. If you are buying young starter plants, look for ones that are well-rooted.
Begonias tend to have brittle stems, so watch for damaged branches.
They prefer as much light as possible without being exposed to the direct afternoon sun. They also grow well under artificial light. Keep them just barely damp. Whenever possible, avoid getting water on the leaves. They also prefer distilled water.