Drought also has a greater impact on Dongkui Bayberry. High temperature and drought during the seedling stage will not only weaken the growth of the seedlings, but also cause a large number of dead seedlings. Due to long-term drought, young trees have difficulty in sprouting; or new shoots are short and weak, which affects the expansion of the crown. Especially young trees planted for the first time will be killed by the sun if they encounter high temperatures and drought that year.

The exposed branches of mature trees due to incomplete crowns will cause bark bursts or even withering in dry and hot weather. If an adult tree encounters long-term drought during the summer shoot germination period, it will stop sprouting; or the sprouted shoots will become slender. Such a tree will promote vigorous growth of autumn shoots. In addition, due to the weak growth of the autumn shoots, the flower buds on the autumn shoots are stunted, with many deformed flowers, and serious flower drop in the next year. Therefore, drought is the fundamental reason for the disorder in the sprouting stage of Dongkui bayberry, which in turn causes the flower buds to develop poorly and results in low yield.

Long-term drought affects tree photosynthesis and affects the accumulation and transportation of carbohydrates. This affects the differentiation of flower buds, resulting in stunted flower buds, many deformed flowers, and severe flower drop.

In the case of drought and water shortage, the development of young fruits is difficult, the fleshy columns are thin and pointed, there is less juice, more sourness, and poor quality.

When drought occurs during the ripening season, the fruit will easily dry up, the flesh column will shrink, the juice will be less, and the quality will be reduced; and the picking period will be shortened. Therefore, drought is also unfavorable weather for high-quality and abundant Dongkui Bayberry production.