Description
Vietnamese coriander is the edible-leaved tender perennial of Persicaria odorata, a member of the knotweed family (Polygonaceae). Despite its common names, it is neither a true coriander nor a mint: those belong to the carrot and mint families respectively, and this plant merely resembles them in aroma and habit.
It forms a low, spreading clump reaching roughly 15 to 45 cm tall, runny enough to double as a ground cover in a warm, moist garden. The leaves are narrow and lance-shaped, glossy green, and usually marked with a dark chestnut chevron following the midrib, with a burgundy blush on their undersides. This marking is a useful clue but varies between leaves and is not sufficient on its own to identify an edible herb.
The flavour is the point: fresh leaves carry a coriander-like lift with an added spicy, peppery heat that true cilantro lacks. The warmth — and the fact that the flavour survives light cooking better than cilantro — is why it is so valued in tropical kitchens where ordinary coriander bolts and fades in the heat.
Origin & History
The plant is native to Southeast Asia, and its names trace the cuisines that use it most: Vietnam, Malaysia, Singapore, Thailand, Cambodia and Laos. It is grown as a kitchen herb and flourishes in warm, damp ground, making it one of the more reliable leafy seasonings of lowland tropical gardens.
Because it is perennial and tolerates warmth without rushing to seed, it has become a standby substitute for cilantro in hot climates; bunches from the grocer root in a glass of water and keep growing. It works as a finishing herb scattered over salads and soups, or briefly cooked into broths and stews.
Uses
Culinary
- Fresh garnishes: Tear or scatter whole young leaves over soups, noodles and salads where their peppery bite shows
- Laksa and noodle soups: A signature herb in Malaysian and Singaporean laksa, used to perfume the broth as well as finely shredded for a garnish
- Rice dishes: Recognisable in nasi kerabu (northern Malaysian herb rice), often alongside kaffir lime and wild herbs
- Stews and braises: Added late to dishes such as Vietnamese fish stews so its flavour registers without prolonged cooking
- Cilantro substitute: Use where you want a hotter, more persistent version of coriander
Traditional Uses
The leaves have a long history in folk medicine across its range, typically as a digestive or flavouring remedy. As with fresh culinary herbs generally, these are traditional descriptions, not clinical guidance; it is best enjoyed as a flavouring within an ordinary varied diet.
Nutritional Benefits
Eaten in small quantities as a seasoning rather than a vegetable, Vietnamese coriander is not a meaningful source of macronutrients per serving. Its aroma chemistry is better understood than its nutrition: the essential oil holds aldehydes (notably decanal) and alcohols (dodecanol and decanol) behind its coriander-and-pepper scent. Its real kitchen value is the flavour it lends to fish, vegetables and broths, not any single nutrient.
How to Prepare
- Choose: Pick bunches with perky, unblemished leaves and crisp reddish stems; pass on yellowed or wilting leaves.
- Rinse: Wash gently and pat dry, as with any soft herb.
- Strip: Pinch the tender young leaves from the top of the stems; discard coarse woody lower stems.
- Cut or tear: Tear leaves whole for garnish, or chop finely when a more even distribution is wanted.
- Add late: If cooking, add in the final minutes or off the heat — long cooking softens its fresh peppery character.
- Store: Keep wrapped in a damp towel in the fridge, or stand fresh stems in a jar of water; the plant roots easily for a continuous supply.
Recipes
As Jungle Kitchen develops recipes featuring Vietnamese coriander, those will be linked here.
Suggested applications: laksa with Vietnamese coriander, herb-rice bowls, chicken and Thai basil salad, fish stew finished with rau răm.
Varieties
Persicaria odorata is generally treated as a single cultivated species rather than a range of named cultivars. Rather than varieties, the more useful distinctions are its lookalikes:
- True coriander (Coriandrum sativum) — an annual with flatter, rounder leaves and a cooler flavour; bolts quickly in heat.
- Culinary mints (Mentha) — square stems and opposite leaves; missing the coriander note.
Fun Facts
- Called both "coriander" and "mint," yet botanically related to neither — it sits in the knotweed family.
- Many leaves carry a dark chevron, although the marking is variable.
- Its flavour hangs on through light cooking, which sets it apart from wilting-prone cilantro.
- It roots so readily from a grocery bunch that many gardeners never need to buy seeds.
- In laksa it is known as the "laksa leaf," carrying part of the dish's distinctive perfume.