The great thing about rex begonias (Begonia rex-cultorum) is that there's a huge variety of colors and patterns, leaf shapes, sizes and textures to choose from. They do flower but those dainty blooms aren’t the main attraction. They can also be grown indoors or out! The collection of rex begonias above showcases some of the gorgeous foliage you can find. Scroll down to see a photo gallery of our favorites that shows even more variety. (Just a note, these are the colors you can expect from mature specimens. Young plants aren’t always as colorful when you first get them, but are worth the wait!) While growing rex begonias is usually pretty easy, I talked with a few expert growers to get their advice and ensure success with these foliage beauties. How to grow rex begonias indoorsRex begonias are tender perennials that are only cold hardy in USDA zones 10 to 11, they are commonly grown as an annual or indoor plant. They're grea