What causes the leaves of elm bonsai to turn yellow and dry up?

The lower leaves of the elm bonsai are dry and shedding, and the young leaves are yellow or white, and the upper leaf edges are rolled up, and there are fewer root rots.

1. Caused by root rot caused by long-term watering or too much rain and poor drainage at the bottom of the pot. It is advisable to loosen the soil immediately and water the potting soil after it has dried, and not to fertilize the roots for a short time.

2. Lack of trace elements caused by the lack of soil or organic fertilizer for many years. It is recommended to replace part of the soil or water the fertile leaf water-soluble fertilizer.

As long as the roots do not die, it is still possible to save them, cut off the dead branches, apply water-soluble fertilizer to the fertile leaves in time, and supplement the nutrients, and it will soon be saved.

1. Soil. It usually grows in sandy areas, hills or valleys, so the average soil can meet the needs and is highly adaptable. However, it is best to use well-drained and fertile soil for breeding, which can be prepared with a mixture of manure and peat.

2. Illumination. Elm trees like light, maintenance should provide it with sufficient light time, not less than 8 hours a day, otherwise it will lead to the branches and leaves become smaller, the growth rate slows down and so on.

3. Watering. It can not grow in the pot soil is too humid environment, can not be overwatered during the maintenance period, even in the high temperature season can not be watered at will, a little dry is conducive to growth, but once the humidity is high, the root system is easy to rot, affecting growth, and even leading to death.

Fourth, fertilization. It consumes a lot of nutrients in the peak growing season, so it should be fertilized frequently, and the rotten cake fertilizer should be applied once in about half a month, and combined with nitrogen, phosphorus and potassium.

Manure. In addition, phosphorus and potassium fertilizer should also be applied once before winter to improve cold resistance.

5. Precautions.

It is prone to forked branches and miscellaneous branches during growth, so it should be pruned in time. Pruning time is usually available all year round, but pay attention to not pruning more in summer and rainy season to avoid high temperature or high humidity nutrient loss, resulting in dead branches.

If the elm tree wants to become a good bonsai, learn these tricks, and you will always be able to use it.

1 The potting soil is too wet.

Elm trees are most afraid of too wet soil. Summer is no exception, a little dry is fine, too wet is harmful. Elm trees are more drought tolerant than moisture tolerant.

Many elm bonsai (especially new piles) die in the summer, and most of them are caused by overwatering. If the water is too high and the temperature is too high or the fertilization concentration is not properly controlled, the root system will slowly rot until it is finished, and the elm bonsai will die in summer.

2 Lack of light.

Elm trees should be light-loving and can only grow well in sunny places. If the light is insufficient, its growth is slow, the branches are thin, the leaf spacing is long, the leaf color is light, and the fibrous roots are few and weak. Summer is the first period for elm to take root, and enhancing light will promote its vigorous life activities, accelerate photosynthesis and metabolic function, and make the pile roots further developed and thick.

Moreover, the general family flower raising site will not have sunlight from morning to night, and there is no need for shade. Even in places where the roof platform has a long period of sunlight, as long as the water supply is timely in summer, it is unlikely to cause harm to the elm bonsai. The growth of the root system of an elm bonsai depends entirely on the availability of light.

3. Pruning when untimely.

The function of evaporation heat dissipation regulation of plant leaves is very important. Therefore, in summer, it is important not to prune the branches and leaves of elm trees in a large area, so as not to destroy its normal regulation function, resulting in the water in the potting soil can not volatilize, and the root system is suffocated and rotten. It is difficult for the mild ones to return to normal growth for a while, and the severe ones will die quickly.

4 Root burns.

In summer, when the ground temperature is extremely high due to sunlight, the bonsai is not placed on a wooden board or foam board that can reduce the heat of the irradiation to reduce the heat conduction of the ground and cause root burns.

5 Pest and disease damage.

Diseases and insect pests and improper use of drugs will also lead to defoliation, spraying with 80% dichlorvos 1500 times liquid or wind and thunder 2000 times liquid to kill goldenrod insects, scale insects, and longhorn beetles. It is necessary to avoid using dimethoate, otherwise it is easy to cause drug damage.

1. The potting soil is too dry and too wet, and the elm stump bonsai is afraid that the soil is too wet, and the elm is a drought-tolerant plant, and many stumps die in summer because of the genus.

Too much watering. 2. Elm is a light-loving plant, it can only grow well when the sun is sufficient, the light is insufficient, and the elm bonsai grows slowly, the branches are thin, the leaf spacing is long, the leaf color is light, and the fibrous roots are few.

Summer is an important time for elm trees to take root, and increasing light to promote photosynthesis will allow the roots of elm stumps to grow stronger. Generally, when maintaining, as long as it is placed outdoors, the growth of the root system depends on whether the light is sufficient.

If the elm tree wants to become a good bonsai, learn these tricks, and you will always be able to use it.

The roots are watered and rotten, but fortunately, they are now saved.

Here it comes. However, the dry branches before Bai can't be recovered, and they can only grow back into branches. When it grows more dense, then do modeling, pruning and pressing branches.

Now look at these new branches and leaves are thin and long, it means that the light here is too weak, put it on the windowsill to dry more, remember to move back at noon if it is too hot, don't get too much sun.

Elm is a strong sunshine copy.

Fortunately, the main stem is still alive, and now it is necessary to cut off the dead branches and re-cultivate the backbone branches. It is necessary to gradually strengthen the irradiation of sunlight, especially direct light, and strengthen the management of fertilizer and water, erase the unwanted sprouts, and leave the buds at the required branch points and raise them to lay the foundation for future branches.

The branch grows quite serious, you ask the bonsai seller.

The yellowing and dryness of the leaves of the elm bonsai tree is likely due to the lack of water, which is the result of the lack of water. In addition, if it is in summer, it will be kept outdoors under the scorching sun for a long time, and the leaves will be exposed to strong light for a long time, which will also occur. It is also possible that due to pests and diseases, too much fertilization, improper use of drugs, etc., the leaves may turn yellow.

How to solve the problem of yellowing elm leaves:

1. Elm trees have strong drought resistance, so in the general elm pot life, the soil should not be too wet, and the temperature should be high in summer. Proper watering and fertilization can make bonsai grow better, and the principle of elm and bonsai watering is: watering dry and wet, alternating dry and wet, potted dry or too much water.

2. Give enough light: Elm loves light, so to make it longer, it is necessary to put it in a good lighting condition. But be careful: if the light is too strong, you need to do a good job of shading to avoid burns.

3. Reasonable pruning work to make the elm tree more beautiful. Elm trees are very strong, and in order to maintain their beautiful appearance and ornamental value, they need to be pruned well. The general form of pruning work, in the fall, without cutting branches and branches of the disease, is then pruned.

When the light is insufficient, the photosynthesis of the elm tree cannot be carried out normally, and it cannot produce enough energy to synthesize enough chlorophyll, so it will look yellow. At this time, it is necessary to expose the elm tree to the sun and receive more light.

Watering too much or too little can cause the elm leaves to turn yellow, too much watering, too much water in the soil, there is not enough oxygen in the soil for the elm roots to breathe, and the absorption of nutrients by the roots will slow down, causing the leaves to not have enough nutrients to synthesize chlorophyll and turn yellow. It is necessary to pause watering and place the elm tree in a ventilated and dry place.

When watered too little, the elm plant will be dehydrated, and the leaves will close the leaf stomata in order to prevent the loss of insufficient water, causing the second stage of photosynthesis to be blocked, and the leaves will look yellow. In this case, it is necessary to loosen the soil first, and then water the elm tree thoroughly.

Insufficient nutrients can also cause yellowing of elm leaves, nutrient deficiency is one of the most common causes of yellowing of leaves, the green chloroplasts in the leaves are rich in nitrogen, phosphorus, magnesium and other elements, and when elm trees lack these, they will turn yellow. It can be solved by applying 50ml of 1000 times Huaduoduo general fertilizer at a time.