Chrysanthemums are a staple of fall decorating schemes, and can be purchased anywhere plants are sold starting in late August. Many people treat mums as annuals, displaying them in container gardens to add color to a fall porch. They can, however, also be grown as perennials when planted directly in a flower bed. Remove perennial varieties from their pots and plant them before the ground freezes, and you'll have a good chance they’ll return next year. Available on Burpee.com; $12.95 for one plant.