Ridge Gourd
Luffa acutangula
Ridge Gourd (Luffa acutangula), also known as Angled Luffa or Turai, is a tropical climbing vine in the Cucurbitaceae grown for its young, ridged fruits that are a popular vegetable across South and Southeast Asia. Unlike its close relative the sponge gourd (L. aegyptiaca), ridge gourd is primarily grown for its edible fruit rather than for fiber production.
• Distinguished from sponge gourd by the prominent 10 angular ridges running the length of the fruit
• Also called "turai" in Hindi, "hechima" in Japanese, and "patola" in Filipino
• The young fruits are tender and sweet, with a flavor similar to zucchini but slightly sweeter
• A staple vegetable in Indian, Chinese, and Southeast Asian cuisines
• The flowers are also edible
• Can be confused with the closely related sponge gourd, but ridge gourd has prominently ridged fruit
• Cultivated in India for thousands of years as a vegetable
• Widely grown across South Asia, Southeast Asia, and China
• Introduced to tropical Africa and the Americas
• The genus Luffa contains approximately 7 species, 2 of which are cultivated (L. acutangula and L. aegyptiaca)
• In Indian Ayurvedic medicine, ridge gourd is valued for its cooling and detoxifying properties
• First described by the Dutch botanist Roxburgh in the early 19th century
Vine:
• Climbing by branched tendrils, 3 to 10 meters long
• Angular, ridged stems with stiff hairs
Leaves:
• Large, broadly ovate to suborbicular, 10 to 25 cm across
• 5 to 7 shallow to deep angular lobes
• Dark green, rough-textured
Flowers:
• Large, bright yellow, funnel-shaped, 5 to 8 cm across
• Male flowers in racemes, female flowers solitary
• Open in the early morning
Fruit:
• Elongated, cylindrical, 15 to 40 cm long and 5 to 8 cm in diameter
• 10 prominent angular ridges running the length — the defining characteristic
• Green skin with the ridges creating a distinctive star-shaped cross-section
• Flesh: white, tender, spongy when young, becoming fibrous when mature
• Best eaten when young and tender
Seeds:
• Flat, oval, black, 1 to 1.5 cm long
• Edible when roasted
Per 100 g raw ridge gourd:
• Energy: approximately 20 kcal
• Carbohydrates: 4 to 5 g
• Protein: 1 to 1.5 g
• Vitamin C: good source
• Vitamin A: moderate
• Iron, calcium, and phosphorus
• Contains dietary fiber
• Low in sodium
• The spongy flesh absorbs flavors readily during cooking
• Contains antioxidants including phenolic compounds
Planting:
• Direct-seed after frost danger when soil exceeds 20°C
• Plant 2 to 3 cm deep in hills, 2 to 3 seeds per hill
• Space hills 60 to 90 cm apart
• Provide a strong trellis or fence for climbing
Site:
• Full sun
• Rich, well-drained soil
• Consistent moisture
• Warm temperatures (25 to 35°C)
Care:
• Water regularly during fruit development
• Train vines onto supports
• Fertilize with compost at mid-season
Harvest:
• Harvest young fruits when 15 to 25 cm long, before they become fibrous
• Check every 2 to 3 days — fruits grow quickly
• Cut from vine with a knife
• Frequent harvesting encourages continued production
• In Indian cuisine: turai ki sabzi (stir-fried), in dal, stuffed ridge gourd, and turai chutney
• In Chinese cuisine: stir-fried with garlic, in soups
• In Thai cuisine: in curries and stir-fries
• In Filipino cuisine: pinakbet (vegetable stew) and ginataang patola (in coconut milk)
• Stuffed with spiced meat or vegetable fillings
• Peeled and sliced into curries and stews
• The ridges can be slightly bitter — peeling reduces bitterness
• Young leaves and flowers are also edible when cooked
• In some regions, the mature fibrous interior is used as a coarse scrubber (though inferior to true loofah)
Fun Fact
Ridge gourd and sponge gourd are so closely related that they are often confused, but you can always tell them apart by touch: ridge gourd has 10 sharp, angular ridges running the length of the fruit (like the ridges on a courthouse column), while sponge gourd is smooth and cylindrical.
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