What to Do When Baby Napa Cabbage Won't Form Heads? 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, generally maturing in 45-55 days, so many people grow it. However, when the phenomenon of not forming heads occurs during cultivation, it makes farmers very sad. Let's take a look at what is going on below.
1. The variety is unsuitable
Many farmers do not consider the characteristics of the variety when planting and blindly buy seeds. For example, introducing a late-maturing variety suitable for growing in the south to a high-cold region for cultivation will cause the phenomenon of not forming heads.
Countermeasures: For this situation, first understand the characteristics of the variety, then choose a variety suitable for local cultivation according to local conditions, so that it can form heads normally.
2. Unsuitable temperature
Baby napa cabbage likes a mild climate. The suitable growth temperature during the rosette stage is between 17-22 degrees. At this time, if the temperature is too high, it will cause excessive growth, delaying head formation or preventing head formation. But if the temperature is too low during the heading stage, without enough accumulated temperature, the heart leaves will grow slowly and cannot form heads normally.
Countermeasures: When planting, consider the local climate environment and choose a suitable time for sowing, so as to ensure a suitable temperature during the rosette stage and normal head formation. If growing in a greenhouse, strengthen ventilation at high temperatures to lower the greenhouse temperature, and take good insulation measures at low temperatures.
3. Improper fertilization
Summer temperatures are extremely high, and this is also the 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, 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 firm.
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 high field humidity will affect the normal growth of baby napa cabbage and can also cause failure to form heads.
Countermeasures: Watering should be even and sufficient, but do not water too much at one time. It is best to water lightly and frequently, keeping the soil moist. After rain, drain water in time to reduce humidity.
The above is an introduction to the causes of baby napa cabbage not forming heads and the countermeasures. We hope it can help you. If you want to learn more related knowledge, please keep following us.