Perennial Hibiscus
Perennial hibiscus may look like a tender tropical plant, but it's hardy enough to withstand winters to Zone 5. This giant plant bears 12-inch-wide flowers in stunning shades of red, pink, and white on stems that reach 7 feet or more tall. It's slow to emerge in spring, but once it does it grows quickly.
Name: Hibiscus moscheutos selections
Zones: 5-10