Pint plant of Hibiscus calyphyllus Lemon Yellow Rosemallow. This perennial shrub with its striking, large, lemon yellow flowers and velvety leaves is perfect as an informal border or as a centerpiece in a small garden. A dense, perennial, rounded shrub, up to 9 feet high, the leaves are large, light green, soft and velvety. The flowers are lemon-yellow, large, up to 4 inches in diameter, with a deep red to blackish center. Flowering time is all year round, but mainly from January to April. Hardy in zones 7a to 11.