Results are shown in the following table and reveal an increase in chilling injury of Thai basil as the time of exposure to low temperature is increased. Twining forms are also known. Sweet potato is a tropical plant, a perennial often grown as an annual. It is grown for its tuber and widely cultivated in south-east Asia. There are hundreds of varieties grown throughout the world and the tubers vary in shape, size and colour of flesh and skin as well as texture.
Flesh colour varies from white to deep orange to purple.
Nutritional value Sweet potato has a higher nutritional value than that of potato. Sweet potatoes are grown in tropical-subtropical, warm and humid climates. They require fertile well-drained soils. Plants are propagated from sprouts or stem cuttings, spaced at a distance of 30-40cm apart. Preparation Wash and scrub clean.