Morus sp. 'Issai' (Issai Mulberry)

Morus, commonly known as Mulberry, is a genus of deciduous or occasionally evergreen trees and shrubs in the Moraceae family, native to temperate and subtropical regions of Asia, Europe, Africa, and the Americas. The leaves are alternate, usually serrated, and remarkably variable in shape, even on the same tree, ranging from unlobed to deeply lobed. Small, inconspicuous flowers are borne in catkin-like clusters, with male and female flowers occurring on the same or separate plants, depending on the species. The familiar mulberry fruit is actually a multiple fruit formed from an entire female inflorescence, becoming fleshy as it matures. Important species include Morus alba (White Mulberry), traditionally cultivated for silkworm feeding, M. nigra (Black Mulberry), prized for its richly flavored fruits, and M. rubra (Red Mulberry), native to eastern North America.

Morus species generally grow best in full sun and fertile, well-drained soil, although many tolerate poorer soils and seasonal drought once established. Many commonly cultivated mulberries are fast-growing trees that respond well to pruning, and selected dwarf or weeping forms are suitable for smaller gardens or large containers. Fruit colors range from white and pink to red and nearly black, depending on species and cultivar; the names White, Red, and Black Mulberry do not reliably indicate fruit color. Cold hardiness varies considerably: commonly cultivated temperate species generally grow in USDA Zones 4-9, while some subtropical species require warmer conditions. Ripe fruits are edible fresh or processed into jams and desserts, but fallen berries can stain paving and attract wildlife.

Morus 'Issai' is a compact mulberry cultivar valued for its early and reliable fruiting. It produces sweet, elongated dark berries and is well suited to small gardens and container growing due to its naturally dwarf growth habit.