A Detailed Guide to the Best Time and Method for Pinching Off the Tips of Yardlong Beans

There are quite a lot of vegetable varieties grown in rural areas, and basically every household grows yardlong beans. Whether stir-fried or pickled, yardlong beans taste great. During the growth of yardlong beans, the tips need to be pinched off, which helps increase their yield. So when is the best time to pinch them off? And how should it be done? Let's take a look together.

1. Timing of Pinching Off the Tips

 Pinching off the tips of yardlong beans must be done in two steps. First, we need to understand the purpose of pinching. The first pinching is done when the plant height is about 70 cm. At this time, pinching is to prevent the plant from growing excessively and to encourage it to branch more. If you want a high yield of yardlong beans, how can too few branches work? So this first pinching is mainly to encourage more branching. The second pinching is done when the top of the yardlong bean is about 30 cm from the greenhouse film. At this time, pinching is to let nutrients flow back, promote reproductive growth, and stop it from growing vines instead of flower buds. When later branches grow up again, no matter how many there are, as long as they reach 30 cm from the greenhouse film, all of them should be pinched off. If they form clusters at the top, it will affect light exposure and also have a considerable impact on yield.

2. Method of Pinching Off the Tips

When the yardlong bean plant grows to 80 cm, first find the main vine, then pinch off the tip at the top of the main vine to control plant height and encourage the lower part to produce more side branches. When the side vines flower and bear pods, later vine growth will also emerge, and at this time pinching should also be done. If the yardlong bean trellis is too high, you can use a bamboo pole to knock off the top tip, which has the same effect. Using the tip-pinching technique on yardlong beans generally increases yield by more than 20%. This method is known to older farmers in rural areas, and friends who are interested may as well give it a try.

3. Points to Note

The vines of yardlong beans have strong growth vigor. If they are not managed in time, the vines will consume too many nutrients and reduce flowering and pod setting in yardlong beans. Pinching off the tips can reduce apical dominance, shift vegetative growth to reproductive growth, and encourage more side vines, more flowers, and more pods, thereby increasing yield. Yardlong beans grow very fast, and ineffective side branches growing on the stems and vines should be pruned in time. You can also pick and pinch at the same time, which not only saves time but also helps with yield. However, one point to note is that not all yardlong beans are suitable for tip pinching. Climbing long yardlong beans that are trained on trellises should have their tips pinched, but some varieties do not need trellising, so they do not need tip pinching.

The above is an introduction to the timing and method of pinching off the tips of yardlong beans. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.