Mung beans can grow 36 inches tall. Mung beans produce clusters of black pods 3 to 4 inches long and reach maturity 120 days after planting. The seeds also vary in color and may be yellow, brown, mottled black, or even green. Mung beans are self-pollinating.

Mung beans are light yellow in color when the skin is removed. Mung bean paste can be made by shelling, cooking, and grinding the beans into a dry paste.