Coffee is a medium-size tree of RUBIACEAE family. The plants can live up to 25 years and grows to a height of 6–15 m; commercially are kept to the height of 175–185 cm. The leaf is developed from the axil and arranged in pairs. The leaves on the main trunk develop in pairs and spirally, whereas leaves from the branch develop in a fan-like manner. The size of the mature leaf of Liberica coffee is approx 15–30 cm × 5–15 cm, with 7–10 veins. The dorsal surface is smooth and shiny. The mature leaf of the Robusta coffee is about the same size, except that it has 8–13 veins, whereas the dorsal surface is shiny and wavy. The tree starts flowering at the age of 18–36 months. The flowers develop from the axil of the leaves in the form of several in a bunch. Coffee berries are green when immature and turn yellow and red at maturity and ripening.