Gardening with Wilson

The Indian lettuce is an edible leafy vegetable that is quite prevalent in Singapore’s community gardens. Botanically known as Lactuca indica, the Indian letttuce is a member of the daisy family, Asteraceae and related to the common lettuce (Lactuca sativa).

This vegetable is not available for sale commercially in Singapore and only the more senior gardeners are probably the ones who are familiar with it. They called it the “goose vegetable” (鹅菜) because the greyish green leaves were reportedly harvested and fed to geese several decades back when Singapore still had villages and farms.

Native to warmer parts of China, Taiwan and southern Japan, the Indian lettuce is thought to be introduced to this part of the world by Chinese immigrants. The plant is a perennial which sends up new shoots from the base of the plant. It adopts a rosette growth habit when young and depending on the cultivar, the leaves of this plant can range from simple, undivided to deeply pinnated. The one seen locally produces oblong-lanceoate in shape. There is a cultivar with prominent red mid-ribs.

 With time, one will notice the leaf to leaf distance on the stem elongates and the leaves start to get narrower and shorter as well. When the plant attains a height of about 1.5 to 2 m, it will start to send up its inflorescence. The inflorescence is much branched and the daisy-like flowers each resembles a poached egg, complete with a yellow center and white rays. Growth terminates for that particular shoot and the plant spends its energy to produce seed. The plant sometimes sends up new sideshoots from the base.

Seedheads form after the flowers fade. One will be able to find numerous small and black coloured seeds loosely clustered around each seedhead. Each seed is flat, hard, black in colour and has some interesting-looking fluff that is attached to it on one end. With that characteristic, seeds of the Indian lettuce appear to be wind-dispersed. To grow this plant, one has to start from seeds but these are not available commercially as well. It is best to get fresh seeds by approaching a gardener who is growing some Indian lettuce plants in his/her garden.

The leaves of the Indian lettuce are not particularly nice to eat and are rather coarse in texture. When injured, the wound exudes a white latex. In my community garden, the Indian lettuce is grown like a cut-and-come-again vegetable where the leaves located lower down on the stems are harvested while leaving the plant to continue to grow. We do not uproot the entire plant for food. Besides being edible raw, steamed and boiled, Indian lettuce leaves have medicinal uses too. According to Plant Resources of South-East Asia (PROSEA), they are believed to possess tonic, digestive and depurative properties.