In general, most Cassia trees thrive in hot and humid climate and bloom profusely following a prolonged period of dry season. In the tropic, these delightful Cassia trees burst into blooms with spectacular cascades of inflorescences of flowers throughout summer months, which is a sight to behold. On rainy days, the fallen colorful flower petals carpeting the ground underneath the trees looks completely magical. Their blooms are either red, pink, yellow or orange in color. Hybrid offsprings with the blending of traits from these Cassia species produce a wide range of colors that do not normally exist in nature. The blossoms range in hue from deep yellow to white, from pink or red to deep orange, or the combination of these colors (rainbow). Cross pollination between species can occur naturally or it can be facilitated by humans. A bright orange Cassia Hybrid in Author's Collection Like most species of Cassia, their hybrids are remarkably resilient as they grow in a wide range
Kukiat's Articles on Tropical Flowering Trees