What to Do If Baby Napa Cabbage Does Not Form a Head? Cause Analysis and Countermeasures

Baby napa cabbage is a type of napa cabbage, but compared with napa cabbage, it is an early-maturing variety, and its entire growth cycle is much shorter than that of napa cabbage. It generally matures in 45-55 days, so many people grow it. However, when the phenomenon of not forming a head occurs during cultivation, it makes farmers very sad. Let's take a look at what is going on.

1. Poor variety

Many farmers do not consider the characteristics of the variety when planting and blindly buy seeds. For example, introducing late-maturing varieties suitable for planting in the south to high-cold regions for cultivation will cause the phenomenon of not forming a head.

Countermeasures: For this situation, first understand the characteristics of the variety, then select a variety suitable for local cultivation according to local conditions, so that it can form a head normally.

2. Unsuitable temperature

Baby napa cabbage likes a mild climate. The suitable growth temperature during the rosette stage is between 17-22°C. At this time, if the temperature is too high, it will cause excessive growth, delaying head formation or preventing head formation. However, if the temperature is too low during the heading stage and there is not enough accumulated temperature, the heart leaves will grow slowly and cannot form a head normally.

Countermeasures: When planting, consider the local climate environment and choose a suitable time for sowing, so as to ensure that the temperature during the rosette stage is suitable and that heads form normally. If growing in a greenhouse, strengthen ventilation during high temperatures to lower the greenhouse temperature, and take good insulation measures during low temperatures.

3. Improper fertilization

Summer temperatures are extremely high, and this is also a period of rapid growth for baby napa cabbage. Some farmers, in order to promote the growth of baby napa cabbage, apply too much nitrogen fertilizer and do not pay attention to the application of other fertilizers, resulting in excessive vegetative growth and failure to form heads or loose heads.

Control methods: During the heading stage of baby napa cabbage, when fertilizer demand is greatest, nitrogen, phosphorus, and potassium account for about 90% of the total fertilizer ratio. Increase the application of phosphorus and potassium fertilizers, control the amount of nitrogen fertilizer applied, inhibit plant growth, and promote heading and head formation. In addition, during the heading stage, carry out multiple foliar fertilizer sprays so that the heads are compact.

4. Insufficient water

Summer is hot with high temperatures and large water evaporation, while the growth of baby napa cabbage also requires a large amount of water. If watering is not done in time at this time, it will cause failure to form heads. But summer is also a rainy season, and the field humidity is relatively high, which will affect the normal growth of baby napa cabbage and also cause failure to form heads.

Countermeasures: Water evenly and sufficiently, but do not water too much at one time. It is advisable to water frequently in small amounts and keep the soil moist. After rain, drain water in time to reduce humidity.

The above is an introduction to the causes and countermeasures for baby napa cabbage not forming a head. I hope it can help you. If you want to learn more related knowledge, please follow us.