What to Do If Napa Cabbage Doesn't Form a Head? Cause Analysis and Remedies

Napa cabbage is a vegetable that many people enjoy eating very much, and it is also extremely common in our lives. Napa cabbage is a seasonal vegetable in winter, and its cultivation method is also very simple, but after planting it, many people find that the napa cabbage does not form a head. So why doesn't napa cabbage form a head? How can we prevent napa cabbage from failing to form a head? Let's take a closer look below.

1. Reasons Why Napa Cabbage Doesn't Form a Head

There are many reasons why napa cabbage doesn't form a head, but the main one among them is caused by low temperature and high humidity. Increased rainfall will trigger various diseases, affecting the growth of napa cabbage, not only causing it to fail to form a head, but also possibly leading to plant rot and death. Secondly, improper fertilization, improper water supply, and improper pest and disease control are all reasons that cause napa cabbage to fail to form a head.

2. Prevention Methods

Since there are many reasons that cause napa cabbage to fail to form a head, there are also quite a few methods to prevent it. Let's take a look together at the specific solutions below.

Scientific fertilization: Improper fertilizer application will cause napa cabbage to only grow leaves without forming a head. Many people, when fertilizing, tend to apply too much nitrogen fertilizer to promote the growth of napa cabbage, but this is actually incorrect. During the cultivation of napa cabbage, we should not apply too much nitrogen fertilizer; generally, potassium fertilizer and phosphorus fertilizer should be the main ones, with only a small amount of nitrogen fertilizer applied. About twenty days after planting napa cabbage, you can begin to increase the application, and topdress once every half a month. Secondly, when the napa cabbage begins to form a head, we need to spray foliar fertilizer once about every week, which can ensure the compactness of the head formation.

Regulating humidity: During the growth period, napa cabbage needs a large amount of water, but the water supply must be balanced and not too much at one time and too little at another. In dry weather, water once each morning and evening, but during continuous rainfall, the excess water in the field must be drained promptly to prevent the leaf surface from curling when the napa cabbage is heading. At the same time, to avoid water loss, we can also cover the field with a layer of straw, which can maintain soil moisture.

Controlling temperature: Napa cabbage is a vegetable produced in winter, so this also means that its cold tolerance is very good. At the same time, this also shows that it is not heat-tolerant. So what we need to do is reasonably control the weather temperature; we can use the method of building a greenhouse for cultivation, keeping the temperature in a constant state, so that the growth of napa cabbage will not be affected.

Pest and disease control: If napa cabbage is harmed by pests and diseases such as viral disease, soft rot, diamondback moth, and aphids, then the phenomenon of failing to form a head will also occur. Therefore, during the cultivation process, we should observe the leaf surface of the napa cabbage, and if pests or diseases are found, they need to be controlled promptly. For specific medication, you can consult.

Artificial head formation: Artificial head formation is actually very simple, and many growers also understand it; this is also a method commonly used by many people. When napa cabbage does not form a head, many people use straw or palm leaves to tie up the leaves of the napa cabbage, which plays an auxiliary role in head formation, and later the napa cabbage will also slowly form a head.

Based on the above, I believe everyone has gained some understanding of the phenomenon of napa cabbage not forming a head, and the editor has also specifically introduced the reasons and solutions for it. As long as everyone follows the correct process during subsequent cultivation, basically the phenomenon of failing to form a head will not occur.