Coriandrum sativum, commonly known as coriander, cilantro, or dhania, is a versatile annual herb in the family Apiaceae. Cultivated for thousands of years across Asia, the Mediterranean, and the Americas, it remains one of the most widely used herbs in global cooking. Every part of the plant — leaves, seeds, roots, and stems — is edible, though the fresh leaves and dried seeds are what most cooks reach for.
What does Coriandrum sativum look like?
Coriander is a soft, upright plant that typically grows to around 50 cm tall. Its leaves change character as the plant matures: broad and lobed near the base, they become slender and feathery toward the flowering stems. The flowers appear in small, lacy clusters called umbels, coloured white or very pale pink. Petals on the outer edge of the umbel are noticeably longer (5–6 mm) than those facing inward (1–3 mm), giving the flower head a subtly asymmetrical look.
The fruit is a small, globular dry schizocarp, typically 3–5 mm in diameter, containing two seeds. Pollen grains measure approximately 33 micrometres. This structure places coriander firmly in the same botanical family as carrot, parsley, and clove-adjacent spice plants valued across South and Southeast Asian cuisines.
Where is coriander originally from?
Coriander is native to a broad arc stretching from Southern Europe and North Africa through to Southwestern Asia. Archaeological evidence places its use in ancient Egypt and classical Greece, and it spread rapidly along trade routes to South Asia, China, and eventually the Americas. Today it is cultivated commercially in India, Morocco, Russia, Australia, and across South and Central America, among many other regions.
In Sri Lanka, coriander — known locally as koththamalli — is a kitchen staple. Both the fresh leaves and dried seeds feature prominently in curries, chutneys, and rice dishes. Alongside Ceylon black pepper, it forms part of the foundational spice palette that defines Sri Lankan cooking.
How are coriander leaves used in cooking?
The fresh leaves carry a bright, citrus-forward flavour with herbal undertones. They are best added raw or stirred into a dish at the very last moment, since heat rapidly dissipates their aroma. Common applications include:
- Garnishing soups, grilled fish, and meat dishes
- Blending into chutneys, salsas, and guacamole
- Tossing through salads and grain bowls
- Stirring into yogurt-based dips and raitas
In Indian and Central Asian cuisines, however, coriander leaves are sometimes used in larger quantities and cooked longer — a deliberate choice that mellows the herb into a background note rather than a fresh accent. Fresh leaves spoil quickly once harvested and lose most of their aroma when dried or frozen, so they are best used within a few days of purchase.
It is worth noting that a significant minority of people — estimates suggest around one in four — perceive coriander leaves as tasting soapy rather than citrusy. Research has linked this to a genetic variant affecting how certain aldehydes in the plant are detected by smell receptors. Those same aldehyde compounds are used in some soaps and detergents, which explains the association.
What are coriander seeds used for?
The dried seeds of Coriandrum sativum are a distinct ingredient from the leaves, with a noticeably different flavour profile. When crushed or toasted, they release a warm, nutty, lightly spiced aroma with citrus undertones — the result of terpene compounds, primarily linalool and pinene. The flavour is often described as sitting between orange peel and gentle spice, making seeds a natural partner for cumin in spice blends, rubs, and curry powders.
Two main commercial varieties exist:
| Variety | Fruit diameter | Volatile oil content | Primary use |
|---|---|---|---|
| C. s. vulgare (large-fruited) | 3–5 mm | 0.1–0.4% | Grinding and blending in the spice trade |
| C. s. microcarpum (small-fruited) | 1.5–3 mm | 0.4–1.8% | Essential oil extraction |
Large-fruited types are grown mainly in tropical and subtropical countries such as Morocco, India, and Australia. Their relatively low oil content makes them suitable for ground spice products. Smaller-fruited varieties, cultivated in temperate regions, yield a higher concentration of volatile oils and are therefore prized as raw material for coriander essential oil production.
What are the traditional and medicinal uses of coriander?
Beyond the kitchen, coriander has a long history in traditional medicine systems across Asia and the Middle East. Ayurvedic practice has used coriander seeds to aid digestion, manage inflammation, and address respiratory complaints. The essential oil derived from seeds contains linalool, which has been the subject of modern pharmacological research, though clinical evidence for therapeutic claims remains an active area of study.
In Sri Lanka, a tea brewed from dried coriander seeds — sometimes combined with other warming spices — is a common home remedy for colds and digestive discomfort. This preparation, called koththamalli pani, is perhaps the island's most widely consumed herbal drink after Ceylon tea.
How is coriander grown and harvested?
Coriander is a fast-maturing annual that performs best in well-drained soil with moderate sunlight. It is frost-tolerant and can bolt quickly in high summer heat, which causes it to flower and set seed earlier than desired for leaf production. Growers targeting leaves typically harvest before flowering; those aiming for seeds allow the plant to complete its cycle and dry on the stem before threshing.
In Sri Lanka's home gardens and smallholder plots, coriander is sown year-round in cooler, elevated areas and during the dry season in lowland regions. The plant's rapid growth cycle — leaves can be harvested within three to four weeks of germination — makes it practical even in small kitchen gardens. It pairs naturally with other culinary herbs and spice plants such as coconut, which together anchor the flavour base of countless Sri Lankan dishes.
Is coriander the same as cilantro?
Yes and no — it depends on where you are. In North America, "cilantro" refers specifically to the fresh leaves and stems of Coriandrum sativum, while "coriander" typically means the dried seeds. In the United Kingdom, South Asia, and most other English-speaking regions, both the leaves and seeds are called coriander. The plant itself is always Coriandrum sativum regardless of the regional term used.