When is the latest harvest time for napa cabbage?

Napa cabbage, as a vegetable, is very common on people's dining tables. It contains very rich nutrients and is welcomed by many people. There are now very many varieties of napa cabbage, and different varieties have different planting and harvest times. Among them, the common ones are summer napa cabbage and autumn napa cabbage. So after planting napa cabbage, when exactly should it be harvested? Below, the editor will give everyone a brief introduction. Let's take a look together!

1. Harvest standards

When harvesting napa cabbage, timing is very important. If napa cabbage is harvested too early, not only will the yield decrease as a result, but the quality of nutrients such as sugars in the napa cabbage will be low, and its storage tolerance will be poor. According to professional data surveys, in mid-November, for each day of delayed harvest, the average yield can increase by about 700 jin/mu. Therefore, napa cabbage can be harvested appropriately later, but the harvest should not be too late either, otherwise the napa cabbage is prone to freezing damage. At the latest, all of it must be harvested when the temperature drops to minus three degrees.

2. Harvest time for summer napa cabbage

Summer napa cabbage is generally the most standard planting variety. Whether sowing or harvesting, the temperatures during that period are relatively suitable for the growth of napa cabbage. Therefore, the sowing period will also be a bit longer, and the sowing time can also be appropriately changed. When planting summer napa cabbage, the main purpose is to satisfy the market and meet consumers' demand for napa cabbage. Therefore, the sowing time for summer napa cabbage is generally from May to June, while the harvest time is from July to August. However, the appropriate planting time and sowing period should also be chosen according to the characteristics of the planted variety.

3. Harvest time for autumn napa cabbage

Compared with summer napa cabbage, the harvest time requirements for autumn napa cabbage are relatively strict. The growth period of autumn napa cabbage is relatively short, and the heading stage is also relatively fast. Moreover, if it is a mid-to-late maturing variety and needs winter storage after harvest, then in the north it should be harvested around the Minor Snow solar term. In mid-November, the weather conditions are relatively good, so it does not need to be harvested at this time, thereby extending the growth period of the napa cabbage and filling out the leaf heads. Napa cabbage that needs winter storage should be harvested in late November to prevent freezing damage to the cabbage caused by strong cold waves.

4. Harvest precautions

When harvesting napa cabbage, it is still necessary to harvest at the right time according to the variety. For example, if it is an early-maturing variety, then it generally should be harvested after the leaf heads have formed. If the market is booming in late autumn, then it can be harvested and sold before the leaf heads are completely firm. For mid-to-late maturing varieties, the longer the growth period, the more mature the leaf heads will be, and the yield can also increase. Therefore, we should best delay the harvest time as much as possible, but note that napa cabbage can only tolerate light frost. If it encounters a temperature of minus two degrees, freezing damage will occur.