about

Thai long bean (Vigna unguiculata subsp. sesquipedalis), also known as yard long beans, snake beans, and asparagus bean among others, gets its name due to the long, slender shape of the bean pods, which makes them unique and eye-catching. It is believed that they were first cultivated in Thailand and other parts of Southeast Asia and remains a staple crop in the region.

This legume is a member of the Fabaceae family, which includes other legumes such as beans, peas, and lentils. It is a climbing vine that can reach up to nine feet in length. The leaves are trifoliate (divided into three leaflets), and the flowers can be white, pink, and various shades of purple. The pods are the most distinctive feature of the plant, growing up to three feet in length and when mature producing purple or black kidney-shaped seeds.

planting

The Thai long bean is accustomed to hot and humid weather and makes an excellent addition to north Florida’s summer gardens. It can be planted April through the early fall. Plant growth is adversely affected by cold temperatures and frost and the plant requires warm soils (60°F to 80°) to ensure a successful harvest.

It is recommended to direct seed Thai long beans either directly in ground or in containers. When seeding directly in ground, sow the Thai long bean seeds in a 1-inch deep and 3- to 4-inch wide dug-out trench, spaced about three to four inches apart. Cover the seeds with two inches of soil and water the area thoroughly. Rows should be two to three feet apart. You can also seed directly into raised beds and large well-draining containers.

Care

Thai long beans thrive in warm, sunny locations with well-draining soil. They require at least 6 hours of direct sunlight each day. These plants are also vigorous climbers that can grow up to nine feet in length and will require support structures (e.g., trellis, fence, or stakes) and plenty of space. Climbing support should be sturdy enough to support the weight of the plants and their pods. As the plants grow, gently train them to climb up the trellis using soft twine or string. To encourage upward growth and prevent the plants from becoming too bushy, remove any lateral shoots that develop along the main stem.

Thai long beans require regular watering and need about 1-2 inches of water per week, depending on the weather conditions. Water Thai long beans in the morning and at the base of the plants, taking care not to wet the leaves, can lead to fungal diseases. Drip irrigation or soaker hoses are recommended. can be an effective way to irrigate them. During periods of heavy rain, reduce the frequency of watering to avoid overwatering the plants.

Long beans are ready to harvest between 40 to 70 days after seeding. Thai long beans should be harvested when they reach a length of 12-18 inches and are still tender and crisp. By the time they reach a “yard long” their texture will become tough, stringy, and difficult to eat. However, letting some pods fully mature can provide to seeds for next season’s crop. Use a sharp pair of scissors or pruning shears to cut the pods from the vine, being careful not to damage the plant or other pods. Harvest Thai long beans regularly to encourage production of new pods.

Long beans are closely related to black-eyed peas or southern peas more than to pole, bush, snap, or French beans. Thai Long Beans can be used in most recipes to replace all these beans. We just need to keep in mind the flavor will be slightly less sweet and flavorful. Long beans are dense and meaty, never stiff, crisp, or juicy like green beans. They are valued most for their retention of color and texture when used in stews and other slow-cooked dishes. Long beans are a good source of protein, vitamin A, thiamin, riboflavin, iron, phosphorus, and potassium, and a very good source of vitamin C, folate, magnesium, and manganese. Long beans have chewier, but crunchy texture than snap beans with a flavor like dry navy beans or asparagus.