What causes red choy sum (red choy sum) to fail to bolt

Red choy sum is a vegetable that many people quite enjoy, it is rich in nutrients, containing much more vitamins than Chinese cabbage, and when growing red choy sum, the phenomenon of failing to bolt often occurs. What causes this? Follow the editor to learn about it.

1. The time has not yet come

The reason red choy sum fails to bolt may be that the time has not yet come. The time when red choy sum truly grows plump and fat stalks is in early spring; its bolting must go through overwintering low-temperature vernalization. If its bolting time has not yet been reached, growers need not worry, because this is normal and they simply need to wait quietly.

2. Insufficient fertility

Failure of red choy sum to bolt may be caused by insufficient fertility. In winter, because temperatures are relatively low, many plants stop growing, and during the overwintering low-temperature vernalization process of red choy sum, nutrients are needed to trigger it. Therefore, heavy fertilizer should be applied on sunny days, using human and livestock farmyard manure and soybean cake mixed with water, so that nutrition is sufficient to promote bolting.

3. Insufficient light

Red choy sum is a long-day plant. If there is insufficient sunlight for a long time, it may also fail to bolt. Winter already has relatively little sunlight, so the possibility of failing to bolt during cultivation is also relatively high. The small shoots that emerge early can be picked off to let it continue growing; as long as the temperature is suitable, it can also be given additional fertilizer to make it bolt as soon as possible.

4. Boron deficiency

Boron is an element indispensable for the growth and development of many crops; it can promote flower bud differentiation in plants. Conversely, if red choy sum is deficient in boron, flower bud differentiation will be poor, which naturally leads to failure to bolt. So at this time it is recommended to apply Suluboron by flushing, and spray to supplement the boron element needed by the plant and promote bolting.

When red choy sum has sufficient fertilizer and water and suitable temperatures, the plant is extremely prone to excessive vegetative growth and premature bolting, which greatly affects the yield and quality of red choy sum. So many growers spray growth-regulating chemicals to inhibit excessive vegetative growth, but improper use of chemicals will cause the red choy sum to fail to bolt later.

  The above is an introduction to what causes red choy sum to fail to bolt. We hope it can help you. To learn more related knowledge, please stay tuned to us.