Canna lilies are beautiful and very easy to grow, but they're not for gardeners who favor subtlety. Cannas are generally huge with large showy flowers, and they make a visual statement with an exclamation mark. Canna leaves are wide and long (resembling banana leaves) in greens, bronzes, or variegated/ striped patterns. Watching canna leaves shoot up and then unfurl over a few days is an impressive sight. Flower colors range from yellow to orange to nearly black or neon pink. Most cannas grow up to 6 feet tall, occasionally as tall as 8 feet. They are good-humored plants, not demanding much care.