Kokuso is a vigorous, adaptable dual-purpose tree for both fruit and leaf fodder. Fruits are large, have good flavor and ripen earlier than Illinois Everbearing. The leaves are large and glossy. Kokuso is reportedly even hardier than Illinois Everbearing and grown even farther north. The Kokuso Korean Mulberry has sweet and delicious large dark fruit that can be 2 inches long and 1/2 inch wide. It is early bearing and a heavy producer. From Korea, and grown as far north as Minnesota, it is hardy in zones 5-9.