What to Do When Lychee Trees Grow Vigorously but Fail to Flower? All the Solutions Are Here

Lychee is an important economic fruit tree and is widely planted in China, but during cultivation it can show vigorous growth without flowering. This phenomenon seriously affects flower bud differentiation in lychee and can even lead to a total crop failure. So how should it be solved? Let's take a look at the detailed introduction.

1. Insufficient Light

For every plant to grow normally, it must be in a temperature environment suited to its own growth. In such an environment, the higher the temperature, the faster it grows; however, when light is insufficient, the higher the temperature, the more spindly and weak the growth becomes, which is unfavorable for later yield.

Solution: For vigorous growth caused by this situation, temperature should be well controlled while increasing light so that growth returns to normal.

2. Excessive Moisture

Water and humidity are also indispensable for growth. They can promote the synthesis of gibberellin in the plant, but when gibberellin content is too high, it causes cytoplasm to expand and elongate, resulting in vigorous growth. This is especially true during the growth of lychee winter shoots in winter, when it causes vigorous leaf growth and leads to delayed flowering and fruiting.

Solution: Water should be managed reasonably. In the rainy summer season, drainage measures should be well carried out to maintain appropriate soil moisture, but long-term drought should also be avoided. The amount of water used should be determined according to the lychee variety and local actual conditions.

3. Imbalanced Fertilization

Nitrogen fertilizer mainly promotes plant growth. Many fruit growers, in order to speed up the growth of lychee plants, often apply large amounts of nitrogen fertilizer. Once the proportion of nitrogen fertilizer in the soil is too high, the root system's absorption of other nutrients is blocked, and vigorous growth occurs, thus affecting normal flowering and fruiting.

Solution: When fertilizing, make a reasonable combination and apply more organic fertilizer. When vigorous growth is caused by improper fertilization, a low concentration of potassium dihydrogen phosphate can be sprayed to control vigor.

4. Chemical Vigor Control

Vigorous growth in lychee brings certain harms: at best it reduces yield, at worst it causes total crop failure. Therefore, chemicals can be used to control vigor during planting and management. Common growth retardants include paclobutrazol, chlormequat, mepiquat chloride, and daminozide. Spraying them on the leaves can inhibit the expansion and elongation of cytoplasm and achieve growth inhibition. Common growth promoters include ethephon, abscisic acid, and induced resistance agents, which can inhibit the growth auxin indoleacetic acid in the plant and achieve a short-term growth inhibition effect.

The above is an introduction to solutions for lychee trees growing vigorously but failing to flower. We hope it can help you. To learn more related knowledge, please stay tuned to us.