Hibiscus brackenridgei can sometimes become a small tree growing up to 30 feet tall. In the garden, it is most often a 3 to 15 foot tall shrub with a diameter of 8 to 15 feet.
The large flowers are 4 to 6 inches in diameter. They are yellow, generally with a maroon center, and form singly or in small clusters at the ends of the branches. The staminal column is yellow. Garnett reports that the flowers open between 2 and 4 p.m. and close between 9 a.m. and 1 p.m.