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How to Grow Yard Long Bean, White variety

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Yard Long Bean, White variety

Vigna unguiculata subsp. sesquipedalis

vegetable

Yard Long White is an Asian variety of asparagus bean featuring exceptionally long (12-18 inch), slender white pods with a tender, mild flavor. This heat-loving vine produces abundantly throughout summer and fall, making it a prolific producer for warm climates. The white color and delicate taste distinguish it from the more common green varieties.

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Example Yard Long Bean, White variety timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Yard Long Bean, White variety

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Yard Long Bean, White variety

    Around Jun 16

    ≈ 60 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Yard Long Bean, White variety dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily minimum; 8+ hours preferred for maximum productivity
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Water: Consistent moisture during growing season; water deeply 1-2 times weekly depending on heat and rainfall. Avoid waterlogging. 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 from transplant; 75-90 days from direct seed
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Planting depth: 1-1.5 inches for seeds; transplants at soil line

Soil

Type: Well-draining loamy soil rich in organic matter
pH: 6.0-7.0
Amendments:
Compost Well-rotted manure Nitrogen-fixing organisms benefit from nodulation

Growing Zones

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Best in zones 9-11; can be grown as summer annual in zones 7-8 with long season

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

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Growth Stages

1

Seedling

2-3 weeks

Emergence of cotyledons and first true leaves; plant is delicate and small

Keep soil consistently moist but not waterlogged. Provide warmth (70-80°F soil temperature preferred). Thin or transplant when 2-3 inches tall. Start indoors 3-4 weeks before last frost if in cooler zones.

2

Vegetative Growth

3-4 weeks

Rapid vine growth with increasingly complex leaf structure; plant establishes root system and vigorous branching

Provide sturdy trellis or support structure early (plants reach 4-6 feet or more). Mulch around base. Water regularly and consistently. Apply balanced fertilizer or compost tea mid-season. Ensure adequate air circulation.

3

Flowering

2-3 weeks (staggered as vine continues growing)

Delicate pale purple or white flowers appear in clusters along the vines; pollination occurs via bees and self-pollination

Maintain consistent watering as flowers are sensitive to drought stress. Ensure pollinator access. Continue light fertilization with lower nitrogen to encourage flowering. Provide afternoon shade in extreme heat (over 95°F).

4

Pod Development and Fruiting

4-6 weeks of active harvest

Flowers transition to elongating white pods that grow rapidly; pods reach market size within 1-2 weeks of flowering

Harvest pods at 10-14 inches when tender and before maturity to encourage continuous production. Water deeply and consistently; drought stress causes pod drop. Pick every 2-3 days during peak season.

5

Maturity and Decline

Variable; continues until cold weather or 4-6 months of harvest

As pods age, they become thick, fibrous, and starchy; seeds inside enlarge; vine vigor may decline in fall or with cool temperatures

Pull mature seed pods if allowing for seed saving. Remove diseased foliage. Compost vines at season end. In tropical zones, plants may continue producing; in seasonal zones, they decline after first frost.

Companion Planting

Plan your garden →

Plant with:

Corn Squash Pumpkin Marigold Nasturtium Radish Cucumber Eggplant

Avoid planting near:

Fennel Alliums (onion, garlic, leek) Brassicas (when space is limited) Kohlrabi

Common Pests

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

  • Hand-pick beetles and yellow egg clusters. Use row covers for young plants. Apply spinosad or pyrethrin if heavy infestation. Rotate crops annually.

  • Use yellow sticky traps. Spray with insecticidal soap or neem oil. Encourage natural predators like ladybugs.

  • Remove affected plant parts. Use row covers on young plants. Apply neem oil or pyrethrin. Hand-pick if population is small.

  • Ensure good air circulation. Avoid overhead watering. Spray with sulfur dust or potassium bicarbonate at first sign. Remove heavily affected leaves.

Uses

🍳

Stir-fries and Asian cuisine

Culinary

Yard Long White beans are a staple in Southeast Asian cooking, prized for their tender texture and delicate, slightly sweet flavor. They cook quickly and remain crisp-tender, making them ideal for wok cooking, stir-fries, and curries. [source]

🍳

Fresh vegetable dishes

Culinary

Use raw or lightly blanched in salads, or steam and serve as a simple side dish with butter, garlic, or soy sauce. The white color and mild flavor work well in mixed vegetable preparations. [source]

🏠

Nitrogen fixation and soil improvement

Household

Like all legumes, Yard Long Beans form nodules with nitrogen-fixing bacteria, enriching soil with bioavailable nitrogen. Plant residue can be incorporated into soil as green manure to improve fertility for subsequent crops. [source]

💊

Traditional nutritional support

Medicinal

In traditional Asian medicine, yard long beans are valued for their digestive properties and as a source of plant protein, fiber, and micronutrients including folate, iron, and manganese. [source]

🦋

Pollinator support

Wildlife

The flowers attract bees and beneficial insects, providing nectar and supporting pollinator populations during the growing season. Leaving some flowers unharvested supports ecosystem health. [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 10-14 inches long, tender, and before the pod wall thickens (typically 1-2 weeks after flowering). Pods should snap cleanly when bent. Pick every 2-3 days during peak season to encourage continuous production and prevent over-maturity. Use sharp scissors or pruners to avoid damaging the vine. Early morning harvest yields the crispest pods. Mature, dried pods can be saved for seed or left as dry beans.

Fun Facts

  • 🌱 Yard Long White beans can grow a foot or more in just 1-2 weeks once flowering begins, earning their 'yard long' common name (though they typically reach 12-18 inches rather than a full 36 inches).
  • 🌱 These beans are also called 'asparagus beans' because of their tender, asparagus-like texture and flavor, particularly when harvested at optimal tenderness.
  • 🌱 A single mature vine can produce 100+ pods over a season in ideal warm conditions, making it one of the most prolific warm-season vegetables for small garden spaces.

Gardening Terms

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

Compost Full Sun Mulch Pollination Transplant Trellis True Leaves
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