Why doesn't the osmanthus tree bloom? Cause analysis and photo appreciation

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The greatest value of the osmanthus tree is its flowers. The ornamental value of the flowers is very high, and their practical value is very high as well. People like the osmanthus tree because of the overpowering fragrance of its flowers. "Fragrance carried for ten li" is used to describe osmanthus. But if the osmanthus doesn't bloom, what an unpleasant thing that is. It is also a very frustrating thing. But this is also commonly encountered. Why doesn't the osmanthus tree bloom? The editor answers for you.

  Why doesn't the osmanthus tree bloom?? First, insufficient light,has a particularly big impact on the osmanthus tree blooming. Osmanthus has very high light requirements; if there is insufficient light, flower buds are difficult to form. Only when planted in a place with ample sunlight and good ventilation, allowing it to fully receive light, can it bloom normally. So if it is shaded for a long time and cannot receive sunlight, it will affect flower bud formation. Even if there are flower buds, they will drop. Osmanthus trees not blooming are commonly seen in residential compounds, because there are many high-rise buildings there and sunlight is insufficient.


  Second, air pollutionalso affects the osmanthus tree blooming. If air pollution is too severe, it can also cause failure to bloom, and may even cause leaves to drop. For example, the leaves grow smaller and smaller and easily fall off. Especially the blooming effect of osmanthus trees in the city center is very poor.


  Third, severe waterloggingis very harmful to the roots of the osmanthus tree; too much accumulated water will cause root rot. The osmanthus tree likes sandy loam with high, dry terrain and good drainage. If the soil is waterlogged, over time it will cause root rot, and if the roots have rotted, of course it will not bloom. So when planting the osmanthus tree, you still need to pay attention to the choice of its growing environment.


  Fourth, pests and diseases, although osmanthus has relatively few pests and diseases, as long as it is in a shaded, humid, poorly ventilated environment, it will cause disease. After the disease occurs, it will cause leaves to wither and fall off, fewer flowers, and smaller flowers. At this time, insecticides should be used to kill scale insects and aphids. Specifically, you can spray a 70% thiophanate-methyl 1000-fold solution to treat the disease. 


  Fifth, insufficient fertilizeralso affects the osmanthus tree blooming. It is like how can it bloom and bear fruit without enough nutrition? Insufficient fertilizer will cause poor growth and development. Some osmanthus planting environments are poor, which naturally also causes insufficient nutrition, the tree grows weakly, and the leaves wither and fall. So fertilizer should be applied appropriately. But you cannot fertilize blindly, and you cannot fertilize when it should not be fertilized, because this will also affect flower bud formation and is also a cause of failure to bloom or reduced blooming.



Conclusion:The reason why the osmanthus tree doesn't bloom may be one of the above reasons, or it may be a combination of several factors. So there are reasons why the osmanthus tree doesn't bloom; it is not a problem with the tree variety, but more a problem with cultivation. Osmanthus is an excellent garden tree species that combines greening, beautification, and fragrance, and has both ornamental and practical uses. It is also a common green plant that beautifies cities along both sides of streets.

Why doesn't the osmanthus tree bloom

The osmanthus tree can tolerate shade, and its color is bright green, making it suitable for growing in conditions with less abundant sunlight. The process of planting the osmanthus tree is relatively long, but the problem of failure to bloom may also occur. So why doesn't the osmanthus tree bloom? Below let's understand why the osmanthus tree doesn't bloom.

The osmanthus tree not bloominggenerally has the following reasons:

Smoke and dust pollution In recent years some reports believe that osmanthus tree leaves have strong resistance to polluting gases such as sulfur dioxide, hydrogen fluoride, and chlorine gas, so many urban parks have planted osmanthus trees in large numbers. But in fact, because the osmanthus tree originated in mountainous areas with an environmental setting that requires clean air for its growth conditions. In air containing smoke and dust, although it may not necessarily cause injury spots on the leaves, it is enough to inhibit its normal blooming. The osmanthus tree is a tree species that cannot tolerate smoke and dust pollution, and it is not suitable to plant it in places with dense factories.

In addition, on roadsides with heavy traffic, traffic dust is often severe, which affects the osmanthus tree blooming.

Soil conditions unsuitable for osmanthus tree growth The osmanthus tree originated in the acidic soil regions of southern China. The soils of main producing areas such as Suzhou, Hangzhou, and Guilin are all acidic or weakly acidic, with a pH value of around 5.6—6.8. But the soil in some urban gardens becomes alkaline due to long-term effects of industrial dust, construction waste, and excessive application of human feces and urine. Therefore, in alkaline soil or areas with high salt content (such as coastal areas), osmanthus trees do not grow well, and even fewer can bloom.

The osmanthus tree originated in mountainous areas and requires soft soil with good drainage, but many cities have flat terrain and poor drainage, and some have relatively high groundwater levels (such as Shanghai, where the groundwater level is only about 0.5 m), causing poor root development of the osmanthus tree. Good drainage is an important condition for the growth of the osmanthus tree.

Improper maintenance and management During transplanting, poor protection of the root system and the soil ball it carries, or lack of proper pruning of the aboveground branches and leaves, causes an imbalance in the physiological balance between the underground root system and the aboveground branches and leaves, and is also related to improper maintenance and management after planting.

The osmanthus tree is a slow-growing sun-loving tree species. When mixed-planted with other tree species, it is easily shaded by neighboring fast-growing trees. According to surveys, whenever the top of the osmanthus canopy, especially the south-facing direction, is covered by other tree species, it almost never blooms normally. Only in places with relatively ample light can it grow vigorously and healthily. However, the osmanthus tree also cannot endure long-term exposure to the scorching sun and drought. We have seen more than once that during high temperatures in summer, especially in courtyards with a lot of concrete paving, osmanthus trees often experience abnormal massive leaf drop, causing the tree vigor to decline and preventing blooming. In tropical regions, such as Hainan Island, Taiwan, China, and the Lingnan area, although osmanthus trees are distributed there, both their growth and flowering are far inferior to those in subtropical regions, indicating that the osmanthus tree's flowering requirements for climatic conditions are relatively strict.

Because some pests with chewing mouthparts, such as slugs and bagworms, do not particularly like to eat osmanthus tree leaves and are also relatively easy to control, some people mistakenly think that special attention is not needed for osmanthus tree pests and diseases, but this is actually not the case. It is true that the phenomenon of an entire osmanthus tree dying due to pests and diseases is indeed extremely rare, but there are several pests and diseases that can endanger osmanthus blooming. For example, red spiders, whiteflies, scale insects, and lace bugs, which are small and inconspicuous pests, often make osmanthus leaves yellow and withered and growth weak, and are especially likely to cause damage in poorly ventilated, shaded, and humid places. In addition, in locally waterlogged spots, the osmanthus root system is easily harmed by some facultative parasitic fungi such as Fusarium, causing root rot. These pests and diseases can all inhibit the blooming of the osmanthus tree, but they are often overlooked by people.

Why doesn't the osmanthus tree bloom and how to plant the osmanthus tree

The osmanthus tree is a tree species that combines greening, beautification, and fragrance, and also has strong ornamental value. Osmanthus fragrance is enchanting, and many people like to plant osmanthus in their own homes. But sometimes osmanthus does not bloom, so why doesn't the osmanthus tree bloom and how do you plant the osmanthus tree? Let's learn together!

Why doesn't the osmanthus tree bloom

1. Improper seedling selection

Why doesn't the osmanthus tree bloom? It may be improper seedling selection, because there is a type of osmanthus called purple osmanthus, which only blooms after it has grown up. If this purple osmanthus is propagated as a cutting seedling, it will be difficult to bloom. If you want to plant osmanthus well and have it produce many flowers, then you must choose tree seedlings of good varieties. This is very important. Only when good osmanthus seedlings are selected will the cultivation process be more convenient.

2. Improper cultivation

Osmanthus has relatively strong vitality. If osmanthus does not bloom, it may also be due to improper planting. The osmanthus tree is most suitable for planting in sandy soil. In soil with relatively high alkalinity it rarely blooms, and if osmanthus is damaged at the roots or frozen during transplanting, it will also affect its growth. The osmanthus tree likes light and avoids warmth; if it is kept in a place with insufficient light for a long time, it will also affect its blooming.

3. Imbalanced fertilizer ratio

The osmanthus tree is a fertilizer-loving plant, but too much fertilizer is also harmful to it. When fertilizing, you must pay attention to keeping the fertilizer ratio balanced. If there is too much nitrogen fertilizer, the branches and leaves will flourish and the branches and leaves will grow excessively, leading to failure to bloom, while if there is too little, the leaves will yellow and the branches will be thin, affecting the absorption of phosphorus and potassium fertilizers, and it will also not bloom.

4. Caused by disease

Finally, failure of osmanthus to bloom is very likely caused by disease. The osmanthus tree is susceptible to various diseases, such as anthracnose, scale insects, and other pest and disease damage. If not treated in time, it will also affect blooming.

How to plant the osmanthus tree

First, planting season

When planting the osmanthus tree, you must choose the season well. Osmanthus is generally planted in spring or autumn, and it is best to choose a cloudy or rainy day, and to plant it in a place with good ventilation, good drainage, and relatively warm conditions. After planting, you must water it thoroughly, and there must be a certain amount of light.

Second, soil quality

Next, the osmanthus tree also has certain requirements for soil quality. The osmanthus tree requires acidic soil. If it is a potted osmanthus tree, it is recommended to follow a certain ratio. Use leaf mold soil: garden soil: sandy soil: decomposed cake fertilizer = 2:3:3:2 as the soil mixing ratio, then pot it. The best season is spring.

Third, light

Most osmanthus trees are planted in the open air, so they can receive sunlight, but they also greatly avoid strong sunlight and shaded environments. 6-8 hours a day is best.

The content on why the osmanthus tree doesn't bloom and how to plant the osmanthus tree has been introduced. I wonder if everyone understands it! The editor has introduced many reasons why the osmanthus tree doesn't bloom. I don't know which reason your planted osmanthus tree belongs to. You can compare them and then handle it appropriately.