Ipomoea aquatica as a vegetable crop in Hong Kong

The aquatic plant Ipomoea aquatica is grown in southeastern Asia as a summer leaf vegetable. It is particularly common in south China and Hong Kong, where it has a very ancient history. Two methods of cultivation are used in Hong Kong: the dry-land method utilizing raised beds and the wet-land method on flooded paddy-fields. During the summer months I. aquatica supplies up to 15% of local vegetable production.