Yard Long Beans: the Thai name is Tua Fugk Yaew
These are long, deep green ,stringless beans which grow up to 30-60 cm. Cut in short lengths, they are used in stir-fries, curries and sometimes thai soups.
The pods, which begin to form just 60 days after sowing, hang in pairs. They are best, if picked for vegetable use, before they reach full maturity. The plant is subtropical tropical and most widely grown in the warmer parts of Southeastern Asia, Thailand, and Southern China although will grow in milder climates.
You almost need to check or harvest long beans everyday because they grow very quickly. Sometimes a few inches a day!
The beans are planted as seed into slightly damp and warm soil with 1-2 seeds in each planting hole or “hill”. After sowing, water should be withheld until germination has occurred (3-5 days).
The planting bed should be mounded if waterlogging during the season is expected. The planting is usually into single rows about 3 m apart with 30-60 cm between “hills”. The plants are encouraged onto trellises.
Long beans will benefit from extra organic matter added before planting via either a green manure crop or an application of animal manure. This organic matter should be well broken down before planting.
An application of NPK fertiliser and calcium just before planting can also be used as well as further applications of fertiliser (either urea or NPK) during the season. However care must be taken to not over-supply nitrogen as that can lead to excessive growth and reduced yields. Long bean yields also decline if water is under-supplied so care must be taken to keep soil moisture high