Sweet potato (Ipomoea batatas) is a creeping perennial vine grown for its starchy, edible tuberous roots, with heart-shaped leaves, morning-glory-like flowers, and highly variable skin and flesh colors.
The sweet potato (Ipomoea batatas, family Convolvulaceae) is a vigorous perennial with stems 4 metres or more long that scramble over the ground or twine into other plants, rooting and forming tubers where they touch the soil. It arose in cultivation, probably from the Central American species Ipomoea trifida, and is not known wild; it originated in northern South America and Mesoamerica. It is one of the most widely grown root crops of the tropics, a staple food there, and one of only seven food crops in the world with an annual production of more than 100 million tonnes. The root is also a source of industrial starch.
It grows in the tropics up to 2,800 metres, best at 18 to 28°C with 750 to 2,000 mm of rain a year, and young growth can be killed at 5°C. It is easy to grow, preferring a well-drained sandy loam in sun; plenty of potash in the soil is essential for a good crop, and low humidity as the crop matures helps. Unlike many root crops it starts storing starch early, so it can be harvested early: a crop can mature in two months in the tropics. It is one of the most efficient plants at turning sunlight into food energy, and yields are 17.5 to 27.5 tonnes per hectare depending on the variety. It is normally grown from cuttings of the shoot tips, since plants raised from seed vary and yield less; in some areas it has escaped from cultivation and become invasive.
Source: Useful Tropical Plants database (Fern, K.).
Sweet potato is valued for antioxidant, anti-diabetic, anti-inflammatory, wound-healing, and potential cancer-preventive properties due to its rich nutrient and phytochemical content.
Its tubers and young leaves are widely eaten in diverse cooked forms and processed into starches and traditional dishes across Africa, Asia, the Americas, and the Pacific.
The crop holds deep cultural importance worldwide, featuring in ancient South American civilizations, Polynesian traditions, famine prevention history, and seasonal festivals.
It is propagated vegetatively in warm, frost-free climates on well-drained soils, harvested within months, and often cured after harvest to enhance storage and sweetness.