Rex Begonias are grown for their foliage, which is ornamented with swirls, spots and stripes in black, silver, green, red and purple with a range of metallic sheens and interesting shapes. They grow 30-60cm tall and about 30cm wide. As frost-tender subtropical plants, Rex Begonias are perfect for indoors. Place them indoors in bright light but out of direct sun. Avoid keeping the soil too wet, all the top to dry slightly between waterings