Jackfruit is a huge tree that grows to as high as 30 meters, larger than mango, breadfruit etc. It is believed to be indigenous to the Southwestern rain forests of India. Today, it is widely cultivated in the tropical regions of Indian subcontinent, Thailand, Malaysia, Indonesia and Brazil for its fruit, seeds, and wood. The tree grows best under tropical humid and rainy climates but rarely survives cold and frosty conditions.In a season, each tree bears as many as 250 large fruits, supposed to be the largest tree-borne fruits in the world. The fruit varies widely in size, weigh from 3 to 30 kg, and has oblong or round shape measuring 10 cm to 60 cm in length, 25 to 75 cm in diameter. While unripe fruits are green, they turn light brown and spread a strong sweet, fruity smell once ripe.As in durian fruit, jackfruit outer surface too is covered with blunt thorn-like projections, which become soft as the fruit ripe. The seed is 3/4 to 1 1/2 in (2-4 cm) long and 1/2 to 3/4 in (1.25-2 cm) thick and is white and crisp within. There may be 100 or up to 500 seeds in a single fruit.