Canna  

Native to the Southeast as well as South America, cannas aren't shy. Wherever you plant them, they loudly introduce themselves through audacious blossoms and leaves. Red, orange, salmon, coral, pink, cream, or bicolored flowers bloom on 3- to 7-foot stalks in summer and fall. Huge, banana-like leaves stretch from 1 to 4 feet long. Typical leaves are green or bronze, but many new selections sport foliage so shockingly loud you might want to cover them at night to avoid disturbing your neighbors.