Quart plant from Hibiscus It is a large outstanding perennial with enormous 6-8″ dark red flowers that appear in late summer. The body of this plant has a nice, round bushy habit growing 4 to 6 feet tall and 3 to 4 feet wide attracting butterflies and hummingbirds. Make these eye-catchers a must for accent or back-of-the-border interest. Zones 4 to 9