These hardy, deciduous trees are slow-growing and pest resistant. There are two varieties, the most common one will be described next. C. dioica, commonly known as the Kentucky Coffee Tree, is originally from North America. It is said that the Indians and early immigrants at one time roasted and ground the large seeds to make a bitter, coffee-like drink, hence the common name. This tree will eventually reach a height varying from 40 to 90 feet. The bi-pinnate leaves open a pinkish color in the spring and gradually turn blue-green. They are 11/2 to 3 feet in length and 2 feet wide consisting of 40 to 100, ovate leaflets with pointy tips. Kentucky Coffee Trees produce unnoticeable male and female flowers on separate trees. Reddish-brown seedpods follow the female flowers and are 6 to 10 inches long. These persist on the branches for most of the winter. They contain 6 or more, dark brown, 3/4-inch seeds. The wood of this tree is soft, strong and coarse-grained. It has been used in cabinet work, for fence posts, and in construction.

Grow these trees in regular, well-drained, deep, loamy soil in a sunny location. They should be planted in the spring or fall in a sheltered spot. Young trees need to be pruned more than older trees, which rarely need it. This should be done in the winter or early spring. Gymnocladus chinensis isn't as hardy as Gymnocladus dioica.

Seeds may be sown outside.

Gymnocladus dioica;
Gymnocladus chinensis (Chinese Soap Tree. This variety is from China. It isn't as hardy as the other.)