Indian Lettuce (Lactuca indica), also known as Indian lettuce or wild lettuce, is a tall, leafy perennial in the Asteraceae family cultivated across tropical and subtropical Asia for its tender, mildly flavored leaves. Less well-known globally than its cousin the common lettuce (Lactuca sativa), it is nonetheless a vital leaf vegetable in many Asian food cultures, valued for its heat tolerance and long harvesting period.
• A close relative of common cultivated lettuce, belonging to the same genus Lactuca
• Particularly important in Taiwanese, Vietnamese, Thai, and Filipino cuisines
• One of the few lettuce relatives that thrives in hot, humid tropical conditions
• The species epithet "indica" refers to its Indian subcontinental origins
• Widely distributed across tropical and subtropical Asia from India to Japan
• Naturalized in many Pacific islands and parts of tropical Africa
• Grows wild along roadsides, forest margins, and in disturbed areas at low to mid elevations
• Long history of both wild gathering and cultivation throughout its range
• Used in traditional medicine systems including Ayurveda and Traditional Chinese Medicine for centuries
Stems:
• Erect, branched, typically 60 to 150 cm tall, sometimes reaching 200 cm
• Green to purplish-green, with a hollow stem characteristic of the genus Lactuca
• Exudes a milky latex ( lactucarium) when cut
Leaves:
• Large, oblong to lanceolate, 10 to 30 cm long and 4 to 12 cm wide
• Bright green, somewhat fleshy, with smooth or slightly toothed margins
• Form a rosette at the base, then alternate along the flowering stem
• Variable in leaf shape depending on variety and growing conditions
Flowers:
• Small, pale yellow flower heads approximately 1 cm in diameter
• Arranged in open, branched panicles at the top of the stem
• Produce small achenes with white pappus for wind dispersal
• Very low in calories, approximately 18 to 22 kcal per 100 g fresh leaves
• Good source of vitamin A (beta-carotene), vitamin C, and vitamin K
• Contains moderate amounts of folate and B vitamins
• Provides dietary fiber, calcium, iron, and potassium
• Rich in antioxidant compounds including flavonoids and phenolic acids
• The milky latex contains lactucarium, which has mild sedative properties
• Contains lutein and zeaxanthin, important for eye health
Planting:
• Sow seeds directly or transplant seedlings in spring or early rainy season
• Thin to 25 to 30 cm apart in rows 30 to 40 cm apart
• Seeds germinate best at 20 to 25°C in 7 to 14 days
Growing:
• Thrives in full sun to partial shade
• Prefers fertile, moist, well-drained soils with plenty of organic matter
• More heat-tolerant than common lettuce, making it ideal for tropical regions
• Tolerates a wide pH range (5.5 to 7.5)
• Regular watering promotes tender, succulent leaves
• Pinch off flower buds to extend leaf production
Harvest:
• Begin harvesting outer leaves 30 to 45 days after planting
• Individual leaves can be picked or whole stems cut 10 cm above ground for regrowth
• Continuous harvest possible for several months in tropical climates
Culinary Uses:
• Eaten raw in salads, particularly in Vietnamese and Thai cuisine
• Added to soups, stews, and stir-fries — the leaves wilt quickly and absorb flavors well
• Used as a wrapper for spring rolls and other filled dishes in Southeast Asian cooking
• Slightly bitter flavor pairs well with savory sauces, grilled meats, and fish
• Young, tender leaves are preferred for salads; mature leaves for cooking
Other Uses:
• In traditional medicine, used as a mild sedative, digestive aid, and anti-inflammatory
• The latex has been used topically for skin conditions
• Sometimes planted as a green manure or cover crop
재미있는 사실
Indian Lettuce is one of the few Lactuca species that truly thrives in tropical heat — while common lettuce bolts and turns bitter above 25°C, Indian Lettuce keeps producing tender, mild leaves even in the steamiest conditions.
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