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How to Grow Red Noodle

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Red Noodle

Vigna unguiculata subsp. sesquipedalis

vegetable

Red Noodle is a long-podded variety of asparagus bean (yard-long bean) that produces slender, deep red pods reaching 12-16 inches in length. This vigorous climbing vine produces prolific yields of tender pods perfect for stir-fries and Asian cuisine. The plants are heat-loving and thrive in warm growing seasons.

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Example Red Noodle timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Red Noodle

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Red Noodle

    Around Jun 16

    ≈ 60 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Red Noodle dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily minimum
💧
Water: Keep soil consistently moist but not waterlogged. Water deeply 1-2 inches per week; increase frequency during hot weather. Mulch to retain moisture and regulate soil temperature.
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Spacing: 6 inches
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Days to maturity: 60-75 days
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Planting depth: 1-1.5 inches

Soil

Type: Well-draining loamy soil rich in organic matter
pH: 6.0-7.0
Amendments:
Compost aged manure balanced fertilizer (10-10-10)

Growing Zones

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Thrives in zones 9-11; can be grown as warm-season annual in zones 3-8

9a 9b 10a 10b 11a 11b

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Growth Stages

1

Germination & Seedling

2-3 weeks

Seeds sprout in 7-14 days. Seedlings develop two cotyledons and true leaves emerge. Plants remain low-growing at soil level.

Keep soil warm (75-85°F) and consistently moist. Thin seedlings to proper spacing. Protect from strong wind. Provide support structures early.

2

Vegetative Growth

3-4 weeks

Vigorous vining growth with increasingly complex leaf structure. Tendrils extend and climb support structures. Plant height increases rapidly.

Ensure sturdy trellising or stakes in place. Provide consistent watering and fertilization. Monitor for pests. Maintain warm conditions (70-85°F).

3

Flowering

2-3 weeks (overlaps with pod development)

Small purple or white flowers appear along the vine in clusters. Flowers are delicate and short-lived, opening in morning.

Maintain consistent moisture during flowering. Reduce nitrogen-heavy fertilizer; switch to balanced or slightly higher potassium formulation. Ensure good air circulation.

4

Pod Development & Growth

2-3 weeks from flower to harvest size

Flowers transition to long, slender red pods that elongate rapidly. Pods are tender and should be harvested while young for best flavor.

Water consistently; irregular watering causes pod defects and splitting. Harvest frequently to encourage continued production. Support heavy pod loads with additional ties.

5

Harvest & Production

4-8 weeks (until frost or heat stress)

Pods reach 12-16 inches length and deep red color. Plant continues producing throughout warm season if harvested regularly.

Harvest every 2-3 days when pods are tender and pods snap easily. Handle gently to avoid bruising. Continue regular watering and weekly fertilization for sustained yields.

Companion Planting

Plan your garden →

Plant with:

Corn squash cucumber basil marigold nasturtium garlic

Avoid planting near:

onion fennel brassicas (excessive nitrogen competition)

Common Pests

  • Spray with water to dislodge; use neem oil or insecticidal soap in severe infestations. Increase humidity and ensure good air circulation.

  • Remove by hand or strong water spray. Use insecticidal soap or neem oil. Encourage natural predators like ladybugs.

  • Yellow sticky traps; neem oil or insecticidal soap every 7-10 days. Reflective mulches deter adults.

  • Hand-pick and destroy eggs and adults. Use spinosad or neem oil. Encourage parasitic wasps.

  • Improve air circulation. Apply sulfur dust or potassium bicarbonate spray. Remove affected foliage. Avoid overhead watering.

Uses

🍳

Stir-fries & Asian Cooking

Culinary

Red Noodle beans are the traditional ingredient in Asian cuisine, particularly in Thai and Chinese stir-fries. The tender pods have a mild, slightly nutty flavor and delicate texture that absorbs seasonings beautifully. [source]

🍳

Fresh Vegetable Dishes

Culinary

Steam, blanch, or sauté whole pods as a side dish. Can be served raw in salads when very young. The slender pods are visually striking and add color to any plate. [source]

🏠

Nitrogen Fixation & Soil Building

Household

As a legume, Red Noodle fixes atmospheric nitrogen through root nodules, improving soil fertility for subsequent crops. Ideal for crop rotation and sustainable gardening practices. [source]

💊

Nutritional Value

Medicinal

Rich in protein, fiber, vitamins A and C, and minerals including potassium and folate. Low in calories and contains compounds with potential antioxidant properties. [source]

🦋

Pollinator Attraction

Wildlife

The delicate flowers attract bees, butterflies, and other pollinators, supporting garden biodiversity. Vining growth provides habitat for beneficial insects. [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 12-16 inches long and deep red, before they become tough and stringy (usually 8-10 days after flowering). Pick every 2-3 days to encourage continuous production. Pods are most tender in early morning. Gently twist and pull pods, or use pruning shears to avoid damaging vines. Plants will produce prolifically through warm months if harvested frequently.

Fun Facts

  • 🌱 Red Noodle beans can grow pods up to 16 inches long—hence the alternative common name 'yard-long bean' or 'meter bean'—though they're most tender when harvested at 12-14 inches.
  • 🌱 Despite their origin in Africa, these beans became a staple of Southeast Asian cuisine and are now far more popular in Asia than anywhere else in the world.
  • 🌱 Red Noodle is extremely heat-loving; it actually performs best when temperatures soar above 80°F (27°C), making it perfect for hot climates where other beans might struggle.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Full Sun Mulch Trellis True Leaves
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