Coccinia grandis, known locally as Kowakka in Sinhala, is a fast-climbing tropical vine that has been cultivated and gathered across South and Southeast Asia for centuries. In Sri Lanka, it grows readily along roadsides, garden fences, and the edges of cultivated land — a familiar sight in the island's drier lowland zones. The plant is also widely called ivy gourd, scarlet gourd, or tindora, and it holds a respected place in both everyday cooking and traditional medicine.
What does Coccinia grandis look like, and how do you identify it?
The vine produces bright green, oval fruits roughly the size of a large olive. Young fruits are striped with pale green and white; as they ripen they turn a vivid scarlet or deep pink — the origin of the common name "scarlet gourd." The leaves are soft, five-lobed, and slightly waxy. Small white flowers appear throughout much of the year in tropical climates, making the plant one of the more productive climbers in a kitchen garden.
The fruit is harvested young for culinary use. Left on the vine, ripe red fruits can be eaten raw and have a mildly sweet flavour, though most traditional preparations call for the unripe green fruit.
How is Kowakka used in Sri Lankan cooking?
In Sri Lankan households, Kowakka features across a modest but well-loved repertoire of dishes:
- Curry: The halved or sliced green fruit is cooked in a coconut-milk-based curry with turmeric, mustard seeds, and green chilli — a mildly spiced side dish served with rice.
- Mallum (mallow): Young leaves are finely shredded, mixed with grated coconut, lime juice, and dried chilli, and served as a fresh accompaniment to the main meal.
- Porridge: A traditional preparation uses both leaves and young fruit in a thin, lightly spiced gruel, considered particularly suitable for those recovering from illness.
The plant also appears in Indian, Malaysian, and Thai cuisines under its regional names, often stir-fried with lentils or added to sambar. In common with other plants found in Sri Lanka's traditional botanical heritage, Kowakka's culinary and medicinal uses overlap considerably.
What are the traditional medicinal uses of Coccinia grandis?
Kowakka has a documented history in Ayurvedic and Sinhala traditional medicine. Practitioners have long used different parts of the plant — fruit, leaf, root, and stem — for a range of conditions. The following are the most consistently cited traditional applications:
- Blood glucose regulation: Kowakka is perhaps best known in Sri Lankan traditional medicine as a plant that may help manage blood glucose levels. Leaf mallum prepared from fresh Kowakka leaves is specifically recommended in Sinhala medicine for people with diabetes. Preliminary research has explored potential insulin-mimetic compounds in the plant, though anyone managing diabetes should discuss dietary changes with a qualified medical professional.
- Skin conditions: The juice extracted from the fruit or leaves is applied topically in traditional practice for rashes, eczema, and similar inflammatory skin conditions. The antioxidant content of the plant is considered relevant to this effect.
- Digestive health: The high fibre content of the leaves and fruit is traditionally associated with relieving constipation when consumed as a cooked mallow or vegetable.
- Oral hygiene: Rinsing the mouth with diluted Kowakka leaf juice is a folk remedy for persistent bad breath.
- Pain relief: Root and stem juice applied externally has been used in traditional practice to soothe localised aches and joint discomfort.
- Respiratory conditions: Traditional texts reference Kowakka preparations in the management of fever, asthma, and bronchitis, though these uses are less studied in modern literature.
A caution worth noting: because Kowakka may lower blood glucose levels, people who already have low blood sugar (hypoglycaemia) or who take glucose-lowering medication should consume it carefully and under medical guidance.
Where does Coccinia grandis grow in Sri Lanka?
The vine thrives across the island's low-country dry and intermediate zones, particularly in the North Central and North Western provinces. It is well adapted to arid conditions and is among the plants that colonise disturbed ground quickly. You are unlikely to need to seek it out deliberately — in rural Sri Lanka, Kowakka frequently appears as a volunteer on fence posts and garden walls during the wetter months.
The plant is not confined to Sri Lanka: it is found throughout tropical Asia, parts of East Africa, and has become naturalised in some Pacific island groups and parts of the Americas, where it is occasionally considered an invasive species in disturbed habitats.
Does Coccinia grandis have any nutritional value?
As a vegetable, Kowakka is low in calories and contributes useful amounts of dietary fibre, vitamin C, and beta-carotene — particularly in the ripe red fruit. The leaves, when eaten as mallum, contribute iron and folate. These nutritional qualities align with its traditional reputation as a health-supporting food rather than simply a flavour ingredient. The fruit is around 93% water, making it a light, hydrating addition to a tropical diet.
How does Kowakka fit into Sri Lanka's broader botanical traditions?
Sri Lanka's ancient medical traditions — rooted in both Ayurveda and indigenous Sinhala medicine (Deshiya Chikitsa) — make extensive use of plants gathered from the wild and cultivated in home gardens. Kowakka sits in the same tradition as other well-known medicinal plants such as Pongamia pinnata, used for skin and inflammatory conditions, and the culinary-medicinal crossovers common across the island's plant heritage. Visiting rural areas and village gardens in Sri Lanka often brings travellers into direct contact with this living botanical knowledge — a dimension of the island's culture that complements its better-known heritage sites and wildlife.