The yellowing of the leaves of the potted camellia is like this

If there is too much moisture, put it in a ventilated, semi-sunny place

1. The light is too strong.

Camellia is a long-day plant, but at the same time it is a semi-shaded plant, for this plant, the light should be sufficient, not too strong, otherwise the leaves will be yellowed. During growth, the plant is placed in semi-shade to receive scattered light. In autumn, in order to promote the differentiation of flower buds, the daily light time should be no less than 12 hours, and the winter should also be exposed to light for a long time to avoid poor growth.

2. The temperature is too low.

With the exception of a very few hardy varieties, most camellias are sensitive to the cold, and once frozen, it can easily affect the growth of the plant, causing the leaves to turn yellow. In winter, the plant should be placed in a warm place indoors, and the temperature should be kept between 10-15, if it is lower than 5, a warm bag should be put on the upper part of the plant.

3. Excessive watering.

Camellia is moisture-loving, but too much watering can affect the root's respiration and also affect its ability to absorb, which can turn the leaves yellow. In general, it is necessary to pay attention to the amount of watering, not too much, and do not water directly with tap water, let it dry for two days first, and then use it after the chlorine volatilizes. If there is stagnant water in the pelvic soil, it should be discharged first, maintain air circulation, properly loosen the soil, and speed up the evaporation of water.

1. Normal yellowing.

Although camellia is an evergreen plant, but when breeding, the leaves will generally not fall off between 2-3 years, but it will still change leaves, during April and May, part of the old leaves of camellia will turn yellow and then fall off, which is a normal metabolic phenomenon.

2. Lack of growth elements.

When cultivating camellias, if there is a lack of nitrogen, the leaves will turn yellow, and fertilizer should be supplemented in time. Generally, you can apply well-rotted soybean cake water once a month, or add 1% ferrous sulfate solution to supplement the growth elements that camellia lacks in growth.

3. Soil problems.

4. Watering problems.

The watering problem is mainly said to be too dry or too wet for a long time, which will lead to yellow water and dry yellow. If you water too much, the potting soil will be too moist, resulting in stagnant water, which can easily lead to rot of the roots of the camellia, causing the leaves to turn yellow and lose their leaves.

Lack of watering, prolonged drought or dry air will cause it to lack water and the leaves will turn yellow. Therefore, when cultivating camellias, it should be noted that reasonable watering is better to keep the soil moist but not waterlogged.

5. Pests and diseases.

When cultivating camellias, if you encounter pests and diseases such as red spiders and scale insects, it will cause harm to the plant, causing the leaves to turn yellow, and serious leaf shedding, and the whole plant will be affected.

In the event of red spider damage, 50% trithion solution can be used to spray and kill, and scale insects can also be sprayed with special agents, which is best to be reasonably maintained and prevented in advance.

The yellowing of camellia leaves needs to be countermeasures for the cause: if it is less fertilizer, it needs to be properly supplemented; If the watering is unreasonable, you need to water it correctly, and keep the potting soil slightly moist on weekdays; If the soil quality is not good, it is necessary to change the soil in time and change the pot regularly; If it is due to the occurrence of insect infestation, it is necessary to remove the insect infestation in time.

1. Supplementary fertilizer.

The yellowing of the leaves is most likely caused by the lack of fertilizer or an element it needs. At this time, we should replenish fertilizer and other elements it needs in time. Generally speaking, it is enough to apply bean cake water once a month or so, but it is worth noting that the bean cake water must be rotten and not too strong.

In addition, adding 1% ferrous sulfate solution when watering can not only effectively replenish the elements needed by flowers, but also keep the soil slightly acidic.

2. Reasonable watering.

It is likely that the leaves turn yellow and the oak cracks are due to insufficient watering, and too much or too little water may cause its yellow leaves. When watering, we should pay attention not to water too much at one time, so that there is water in the pot, and we can't not water for a long time to cause the soil to be too dry.

3. Change the soil quality.

The yellowing of its leaves may be caused by poor soil properties. Camellia prefers to survive in acidic soils, and if the soil becomes alkaline, it may cause its leaves to turn yellow. In addition, the loss of nutrients from the soil can also cause the leaves to turn yellow.

At this time, we should regularly change the potting soil for the flowers, and we can also apply foliar fertilizer reasonably to prevent its leaves from turning yellow.

Fourth, eliminate insect pests in a timely manner.

When raising this flower, you will often encounter insect pests such as red spiders, and the presence of this insect is likely to cause its leaves to turn yellow. At this time, we need to get rid of these insects in time. Spraying the leaves with a 50% trithion solution is a good option.

In addition to red spiders, it is also possible to encounter scale insects, which can also be sprayed with special agents. Therefore, it is necessary to observe more often, and eliminate insect pests in time once they are found.

There are many reasons for the yellowing of camellia leaves, such as insufficient soil acidity or too strong, improper watering, insufficient nitrogen fertilizer, etc., which may cause the phenomenon of camellia yellow leaves.

Pictured: Camellia. The causes and solutions for the yellowing of camellia leaves are as follows:

1. Insufficient or too strong soil acidity.

Camellia likes acidic soil, if the soil acidity is insufficient or too strong, it will cause some trace elements such as iron, phosphorus and sulfur can not be absorbed and utilized by camellia plants, so that the physiological activities of camellia plants will be impaired, and the lack of chlorophyll will cause yellow leaves.

Solution: Change the potting soil, which can be cultivated with humus-rich mountain mud. You can also water acidic water to adjust the pH of the soil, and the vertical state can be sprayed to the foliar surface once every 7 10 days, 0 2 a 0 3 ferrous sulfate, or sprayed 300 times the solution of phosphorus trithion.

Spraying should be done early in the morning or late afternoon. If the yellowing is severe, it can also be combined with watering, watering alum fertilizer water or O3 potassium dihydrogen phosphate solution.

2. Nitrogen fertilizer is insufficient for yellow leaves.

Nitrogen is an indispensable element for the growth of plant leaves, and if nitrogen fertilizer is insufficient, camellia will also have yellow leaves.

Solution: Appropriate nitrogen fertilizer can be applied.

Pictured: Camellia leaves turn yellow.

3. Improper watering causes yellow leaves.

In daily maintenance work, the water quality should be slightly acidic, and the watering should be appropriate. If you water too much or too little, so that the potting soil continues to be too wet or too dry, the camellia will also yellow and fall off. If the potting soil is too dry, the leaves are easy to curl, wilt and yellow; If the potting soil is too wet, it is easy to cause root rot and yellow leaves, and in severe cases, it will lead to the death of the whole plant of Yu Hengyuan.

Solution: Master the frequency of watering and the amount of water. When camellia enters the spring and summer growth period, the temperature rises, and the water demand increases, so it should be watered once every 10 days, and once in the morning and evening in the summer.

4. Insect pest impact.

Camellia if there is a red spider or scale insect as a pest, it will also cause the leaves of the plant to wither yellow, the former can be sprayed with 5% dimethoate with water - 1000-1500 times liquid, or 50% trisulfon with water 2500-3000 times liquid; The latter can be sprayed with dimethoate aqueous solution.

Pictured: Camellia tree.

5. Macular disease.

It may be a whole-plant camellia disease caused by viral infection. In the early stage of the disease, there is a mottled symptom of uneven color on the leaves, which is faded green or grayish-white, and then gradually appears dark yellow spots, and the leaves of the affected plants become thinner, the chlorophyll decreases, and the growth is weak.

Prevention and control methods: Avoid using diseased plant branches to cutting, and do not use diseased plants as rootstocks or collect scion. If a diseased plant is found, it should be uprooted and destroyed immediately. Usually it can be treated with drugs for the prevention and treatment of viral diseases such as virion and virion clearing.

6. Natural metabolism.

Camellia is an evergreen tree, and its leaves often do not fall off for two or three years after the formation of new shoots. However, during the leaf-changing period in April and May, most of the leaves of the plants, a small number of old leaves, often turn yellow and fall off, which is a normal phenomenon.

Tips] Camellia is one of the top ten traditional flowers in our country, likes a warm and humid environment, has a variety of colors such as red, white, yellow, purple, etc., and has a very long flowering period, generally from October to May of the following year, and is a treasure in the world's horticultural circles.

What should I do if the camellia leaves are yellow, and I have yellow teasing banquet leaf disease? Church silver how do you correctly refer to the reverence.