Latest Analysis of Why Jujube Trees Bloom but Bear No Fruit

Sometimes growers find that the jujube trees they planted grow vigorously with luxuriant branches and leaves, but when it comes to the flowering stage, they simply bear no fruit, or very little fruit. What causes this phenomenon? In fact, there are many reasons why jujube trees bloom but bear no fruit. Next we will introduce each of these reasons separately, along with specific control methods.

1. Causes

The most common cause is excessive tree vigor, which is very likely due to excessive nutrients and overly vigorous growth; when branches and leaves grow too vigorously, the jujube tree consumes too many nutrients and finds it hard to enter reproductive growth, or after entering reproductive growth it has no nutritional support. The second cause may be high temperature and drought; if high temperature and drought occur during the flowering and fruiting period, it may affect pollen viability and the success rate of pollination. The third cause may be an insufficient provision of pollinizer trees, which leads to poor pollination and failure to set fruit. The last cause may be rain; if flowering coincides with rainy days, the pollen absorbs water and splits, dies, and cannot fertilize.

2. Control Methods

1. Control growth

In the early stage, pay attention to trunk training and shaping; once a good tree form is established, you can prune at any time the branches that disrupt the tree form and the surplus branches that consume nutrients, and pinch the tips of some branches appropriately. This can control vegetative growth. Then, with early-stage fertilization, control the amount of nitrogen fertilizer used alone; it is best to apply farmyard manure, and do not apply too much fertilizer.

2. High temperature and drought

The flowering period of jujube trees is from May to July, which is a hot season in many places. At this time it is hot, but there may be drought or there may be rain. If there is drought, you can water in the evening after the temperature drops; persisting every day will alleviate the drought somewhat, or spray water to increase air humidity. Pay attention to the weather: collect pollen before it rains, and carry out artificial pollination after the rain.

3. Pollinizer trees

Jujube trees are monoecious and self-pollinating, but some varieties still need pollinizer trees to increase the fruit-setting rate and ensure fruit set. Sometimes growth regulators can be used to regulate growth, preserve flowers, and promote fruit set. For example, gibberellin sprayed after flowering can enable fruit set even when pollination fails.

When jujube trees bloom but bear no fruit, there are influences from the tree's own factors as well as some other environmental factors. But no matter which factor it is, we should carry out this management well and improve the growing conditions and growth vigor of the jujube trees.