How to Grow Chinese Red Noodle
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Chinese Red Noodle
Vigna unguiculata subsp. sesquipedalis
vegetableChinese Red Noodle, also known as yard-long bean or asparagus bean, is a warm-season legume that produces extremely long, slender pods reaching 12-18 inches. These beans are prized in Asian cuisine for their tender, crisp texture and mild flavor. They're more heat and drought-tolerant than snap beans and prefer climbing or trellised growth.
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Example Chinese Red Noodle timeline · Pittsburgh, PA (Zone 6b)
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Plant Chinese Red Noodle
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Chinese Red Noodle
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Chinese Red Noodle dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 9-11; can be grown in zones 5-8 as a summer annual with frost protection
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Get my Chinese Red Noodle timeline →Growth Stages
Seedling
2-3 weeksSmall bean sprouts with cotyledons and first true leaves emerging
Keep soil consistently moist but not waterlogged. Provide warm conditions (65-75°F minimum). Thin seedlings to 6 inches apart if direct seeded.
Flowering
2-3 weeksDelicate purple, pink, or white flowers appear in clusters along the vines
Maintain regular watering and continue fertilizing with slightly lower nitrogen formula to encourage fruiting. Provide consistent warmth above 65°F for good pod set.
Pod Development
3-4 weeksLong, slender green (or red, depending on variety) pods form and elongate to 12-18 inches
Continue regular watering and feeding. Begin harvesting young tender pods at 8-10 inches to encourage continued production. Support heavy fruit load with additional trellising.
Harvest and Production
4-8 weeksMature pods at optimal eating stage; continuous production if harvested regularly
Pick pods every 2-3 days when young and tender (8-10 inches), before they become fibrous. Remove overmature pods to stimulate more flowering. Continue watering and fertilizing.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Regular misting to increase humidity; spray with water jet to dislodge; use neem oil or miticide if severe
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Spray with strong water stream; use insecticidal soap; introduce ladybugs or parasitic wasps
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Hand-pick beetles and larvae; use row covers early in season; apply spinosad or neem oil
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Ensure good air circulation; avoid overhead watering; apply sulfur or neem oil spray
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Use well-draining soil; avoid overwatering; practice crop rotation; remove infected plants
Uses
Stir-fries and Asian cuisine
CulinaryChinese Red Noodles are a staple in Southeast Asian cooking, prized for their tender, crisp texture that holds up well in high-heat stir-fries. Their mild, slightly sweet flavor complements garlic, ginger, soy sauce, and sesame oil. [source]
Fresh and cooked preparations
CulinaryCan be eaten raw in salads when very young, steamed, blanched, boiled, or sautéed. They remain tender longer than snap beans during cooking due to their thin pod structure. [source]
Nutritional and digestive benefits
MedicinalRich in vitamins A, C, and K, plus dietary fiber, folate, and plant-based protein. Traditional medicine uses the beans for digestive health and as a cooling food in summer. [source]
Nitrogen fixation for soil improvement
HouseholdAs a legume, Chinese Red Noodles form symbiotic relationships with nitrogen-fixing bacteria, enriching the soil naturally and reducing the need for nitrogen fertilizers in crop rotation. [source]
Pollinator and beneficial insect attraction
WildlifeThe delicate flowers attract bees, butterflies, and other pollinators while the plant can shelter beneficial insects that prey on garden pests. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest pods when young and tender at 8-10 inches long, before they become tough and fibrous (typically 8-12 days after flowering). Pick regularly every 2-3 days to encourage continuous production. Use a gentle twisting motion or scissors to avoid damaging the vine. Early morning harvest yields the crispest pods. Stop harvesting when temperatures consistently drop below 55°F.
Fun Facts
- 🌱 Chinese Red Noodle beans are called 'yard-long beans' because they can grow up to 18 inches or more—some heirloom varieties exceed 2 feet in length. The name refers to the traditional Chinese measurement of a 'chi' (about 12-14 inches).
- 🌱 These beans are far more heat and drought-tolerant than common snap beans, making them an excellent choice for hot, dry climates and summer gardening when other beans struggle.
- 🌱 Unlike snap beans which originated in the Americas, yard-long beans originated in Asia and have been cultivated in India, China, and Southeast Asia for thousands of years, remaining more popular in Eastern cuisines than Western markets.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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