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Long Bean Seeds, Taiwan Yard-Long
Description
(Vigna unguiculata) This is a true “yard long” bean that can easily reach over 3 feet in length! This rare variety was brought to America by a Taiwanese immigrant around 1970. Get high yields from a small space; the vines set a heavy crop of these delicious pods that will amaze your friends. They have superior flavor to common beans, are great stir fried, and even work as a perfect spaghetti substitute.
- 75-80 days
- 8-12 hours of sun
- Sprouts in 5-8 days
- Ideal Temperature: 75-95 F
- Seed Depth: 1/2-1"
- Plant Spacing: 6"
- Frost Hardy: No
Growing Tips, Tricks and FAQs
Growing Tips
Taiwan Yard-Long beans, also known as asparagus beans or snake beans, are known for their extraordinary length, sometimes reaching up to 38 inches. These beans thrive in warm climates and are relatively easy to grow with the right care. They tolerate extreme heat and humidity; however, beware temperatures below 60 F.
When to Grow
Plant Taiwan Yard-Long beans after the last frost has passed and when the soil temperature is consistently above 60 F, ideally between 75-95 F. In cooler climates, starting seeds indoors 3-6 weeks before the last frost can give the plants a head start.
How to Sow and Plant
Preparation: Choose a sunny location with well-draining soil, enriched with compost or aged manure. The ideal soil pH is between 6.0 and 7.0. Soak seeds overnight before planting.
Planting: Sow seeds 1/2 to 1 inch deep, about 6 inches apart. If using a trellis, space rows about 18-24 inches apart. Trellises are essential for supporting the vigorous vines.
Watering: Keep the soil moderately moist until germination, then maintain consistent moisture, especially during flowering and pod formation. Mulching helps retain soil moisture and suppress weeds.
How to Grow
Full sun is crucial, with 8-12 hours of direct sunlight daily. Provide a sturdy trellis or poles for the vines to climb, which helps maximize air circulation and sun exposure. You can use a balanced, slow-release fertilizer at planting time. Avoid excessive nitrogen, which can lead to more foliage and fewer pods. Switch to a fertilizer higher in potassium and phosphorus as the plants begin to flower.
How to Save
- This self-pollinating annual in the legume family will not readily cross with other nearby varieties, so a distance of 10-20 feet between other cowpea or long bean varieties is sufficient to ensure pure seed.
- It is super easy to save seed; just allow pods to dry and wait for seeds to become dry and hard.
- You should not be able to dent the seed with your thumbnail.
- Store seeds in a cool, dark, dry place.
FAQ
Can I grow Taiwan Yard-Long beans in containers?
While it is possible, it is not ideal due to their vigorous growth and need for substantial support. If using containers, ensure they are large and deep enough, and provide a sturdy trellis.
What pests should I watch out for?
Common pests include aphids and spider mites. Regular monitoring and the use of natural predators like ladybugs can help manage these pests. Organic treatments such as neem oil or insecticidal soap are also effective.
How do I know when to harvest Taiwan Yard-Long beans?
Harvest the beans when they are about the thickness of a pencil and 12-18 inches long. Overripe pods will become tough and stringy. Frequent harvesting encourages more production.
How can I store Taiwan Yard-Long beans after harvesting?
Store fresh beans in a plastic bag in the refrigerator for up to a week. For longer storage, blanch and freeze the beans to preserve their color and flavor.
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