Rainbow Shower Tree (Cassia × nealiae): Spectacular Hybrid

Rainbow shower tree is a hybrid cassia (Cassia × nealiae) renowned for its stunning, long-lasting clusters of pink, orange, and yellow flowers, the official tree of Honolulu.

Botanical Profile

Description and Features

This semi-evergreen tree grows 30–40 feet tall with a spreading canopy. Leaves are pinnate. In spring to summer, it produces huge, pendulous racemes of flowers that open in shades of pink, orange, and yellow, creating a "rainbow" effect. It is sterile, producing no seed pods.

Cultivation and Uses

Rainbow shower tree requires tropical climates, full sun, and well-drained soil. It is a magnificent specimen tree for parks and large gardens. As a sterile hybrid, it does not become weedy.

Origin

A cross between Cassia javanica and Cassia fistula, selected in Hawaii.