Dahlia is a group of bushy, often tuberous rooted, perennials from mountainous areas of Central America, grown for their blooms in a variety of forms, colors and patterns. Leaves which are about 8-20 in. (20-50cm) long, proportionate in size to the blooms, are mid to dark green. Almost all currently grown cultivars have strong, straight stems and attractive foliage. Dahlias flower from midsummer to first frost when many other plants are past their best. All are excellent for garden display, especially the giant flowered dahlias which are suitable for exhibition. Bedding dahlias are low-growing and may be raised from seed and treated as annuals.