How to Grow Yardlong Bean Pinkeye Purple Hull
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Yardlong Bean Pinkeye Purple Hull
Vigna unguiculata subsp. sesquipedalis
vegetableA vigorous vining legume producing exceptionally long, slender pods (12-18 inches) with purple-speckled purple hulls and tan seeds with a distinctive purple eye marking. This heat-loving Asian bean variety is highly productive and thrives in warm climates, producing tender pods ideal for fresh cooking and stir-fries. The plant is nitrogen-fixing, improving soil fertility while delivering harvests throughout the warm season.
When should you plant Yardlong Bean Pinkeye Purple Hull in your zone?
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Example Yardlong Bean Pinkeye Purple Hull timeline · Pittsburgh, PA (Zone 6b)
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Plant Yardlong Bean Pinkeye Purple Hull
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 Yardlong Bean Pinkeye Purple Hull
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Yardlong Bean Pinkeye Purple Hull dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 8-11; can be grown as summer annual in zones 6-7 with long growing season
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Get my Yardlong Bean Pinkeye Purple Hull timeline →Growth Stages
Germination
1-2 weeksSeeds sprout and develop initial leaves; seedlings emerge within 7-10 days in warm soil (75-85°F)
Ensure soil temperature is at least 70°F before planting. Keep soil consistently moist but not waterlogged. Thin seedlings to proper spacing once true leaves appear.
Vegetative Growth
3-4 weeksRapid vine elongation and leaf development; plant develops compound leaves and strong tendrils for climbing
Provide sturdy trellis or support structure (6-8 feet tall). Water regularly and mulch to retain moisture. Apply light nitrogen fertilizer if leaves appear pale, but avoid excessive nitrogen which promotes foliage over pods.
Flowering
2-3 weeks (overlaps with pod development)Small, delicate flowers appear in clusters along the vines; flowers are typically pale pink, lavender, or white
Maintain consistent watering and moderate temperatures. Flowers are self-fertile but benefit from insect pollination. Apply balanced or slightly phosphorus-rich fertilizer. Maintain humidity for good pod set.
Pod Development
2-3 weeksYoung pods elongate rapidly, reaching characteristic 12-18 inch length within 7-10 days of pollination; pods develop purple speckles and hulls
Increase watering to support rapid pod expansion. Provide phosphorus and potassium support for pod quality. Maintain even moisture; irregular watering causes tough or misshapen pods. Monitor for pests actively feeding on developing pods.
Harvest/Production
6-12 weeks (or until frost in cooler zones)Pods reach full length and tender stage; continuous production throughout warm season as new flowers form
Harvest pods every 2-3 days at 10-12 inches long for maximum tenderness. Regular harvesting encourages continued flowering and production. Provide consistent water and balanced fertilizer. Remove any yellowing leaves. Harvest continues until frost or temperature decline.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with insecticidal soap or neem oil; encourage beneficial insects like ladybugs; strong water spray to dislodge
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Increase humidity with misting; spray with neem oil or sulfur; remove heavily infested leaves
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Hand-pick beetles and egg clusters; apply spinosad or neem oil; row covers for young plants
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Yellow sticky traps; insecticidal soap; neem oil spray; encourage natural predators
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and
Bacillus thuringiensis (Bt) for caterpillars; neem oil for mites; regular monitoring and hand-picking
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Store dried pods in freezer; use food-grade diatomaceous earth; proper seed storage conditions
Uses
Stir-fries and Asian Cuisine
CulinaryYardlong beans are a staple in Asian cooking, particularly in Chinese, Thai, and Vietnamese cuisines. The tender pods are ideal for quick stir-frying, maintaining a slight crunch and subtle flavor that pairs well with garlic, ginger, and soy sauce. [source]
Fresh Cooking and Salads
CulinaryYoung tender pods can be blanched briefly and served as a fresh vegetable side dish, or chilled and added to fresh salads for a legume-based protein boost. The flavor is milder than common green beans with a subtle sweetness. [source]
Dry Bean Production
CulinaryMature dried Pinkeye Purple Hull beans are valued in Southern U.S. cuisine, particularly for making traditional bean soups and stews. The distinctive purple-eyed tan seeds develop deeper flavor when dried and cooked. [source]
Nutritional and Wellness Support
MedicinalYardlong beans are rich in fiber, protein, and polyphenols with documented antioxidant properties. As a nitrogen-fixing legume, they support digestive health and provide plant-based protein for vegetarian diets. [source]
Soil Improvement and Nitrogen Fixation
HouseholdAs a legume, yardlong beans form symbiotic relationships with nitrogen-fixing bacteria in the soil, naturally enriching garden soil with nitrogen. After harvest, incorporating plant residue improves soil fertility for subsequent crops. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Begin harvesting when pods reach 10-12 inches long, before they become tough and fibrous (typically 3-4 days after flowering ends). Harvest every 2-3 days for peak tenderness and continuous production. Pick pods by grasping the vine gently and breaking or cutting the pod stem. Morning harvest yields maximum flavor and crispness. Regular harvesting encourages more flowering; neglecting harvest slows production. Pods can be refrigerated up to 5 days or blanched and frozen for longer storage.
Fun Facts
- 🌱 Despite the common name 'yardlong,' these beans typically reach 12-18 inches rather than a full yard (36 inches), though some cultivars under ideal conditions can approach 24 inches.
- 🌱 The distinctive 'Pinkeye Purple Hull' marking—a deep purple eye spot on tan seeds—not only provides visual appeal but is a genetic marker for this specific variety's superior flavor and texture characteristics.
- 🌱 Yardlong beans are among the most heat-loving bean varieties, actually preferring temperatures above 80°F where common green beans might slow production, making them ideal for hot climates where other beans struggle.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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