A relative of sweet potato, this aquatic plant is the fastest growing leaf crop in the world. It can be grown from cuttings bought from the market. It will even form a mat on the surface if you through some coconut husks into that what with it. It is far more nutritious than lettuce. Often called a weed, it grows so well, a well-managed pond with kang kong is a productive addition to a backyard food system.

Kangkong also known as water spinach. This is a delicious alternative to spinach. It grows easily (and vigorously!) with its feet in water. It is best constrained to a water pot or bathtub as it can take over. It is a perennial but does tend to slow down in winter. Tastes fantastic sautéed with butter, garlic and soy sauce.