seeds from Hibiscus Turn of the Century The pink flower shows off its hot pink swirls around its petals, ending in the center and blossoming from early summer through late fall. What makes it more desirable is the fact that butterflies love Hibiscus Turn of the Century. Hardy in zones 5 to 9. Hibiscus Turn of the Century is very easy to grow and will reach 4 to 5 feet tall, and 4 to 5 feet wide.