Why do evergreen leaves turn yellow in autumn?

There are several reasons for the yellow leaves:

1. Water yellow. Because of the long-term watering caused by the leaf yellow, manifested in the young leaves Yang Huang is dull, the old leaves have no obvious changes, the roots are small yellow and green, the new shoots are not long, watering should be controlled, the heavy ones can be depotted, put in the shade to dry the soil and then pot from the new.

2. Dry yellow. Yellowing of leaves due to lack of water or lack of watering. The old leaves are yellow and shed from the bottom up, but the new leaves usually grow normally. The amount and frequency of watering should be increased appropriately.

3. Fat yellow. Because of excessive fertilization or excessive concentration, the tips of the new leaves are dry brown, and the tips of the old leaves are dry and yellow and fall off, and usually the leaf surface is thick and shiny, but most of them are uneven. Fertilizer should be stopped or washed with water.

4. Lack of fat yellow. Potted flowers are only watered for a long time without watering fertilizer, or do not change the pot for many years, the roots are clumped, the plant can not get fertilizer, so that the leaves are yellow, in addition to changing the pot in time, it should be applied diligently with thin fertilizer.

5. Burn yellow. Potted flowers and foliage plants that like shade and dampness, such as spider plant, evergreen, 1-leaf orchid, hosta arrowroot, etc., if exposed to strong direct sunlight, the leaves often show yellow tips, and should be placed in the shade.

6. Alkali yellow. Flowers that like acidic soil, such as azalea mast camellia, osmanthus white orchid, etc., such as potting soil or water quality is alkaline, often cause the leaves to turn from green to yellow, and even fall off. Two percent - 0.

Spraying with 5% ferrous sulfate aqueous solution can make the leaves turn from yellow to green.

7. Damp and hot yellow. Some flowers that are not resistant to high temperature and humidity are yellowing caused by the extreme summer heat, poor storm penetration, and improper shade avoidance. If the Admiralty is hung upside down, the rhododendron has this phenomenon in a hot and humid environment, and it is necessary to pay attention to ventilation and cooling, and the potting soil can not be too warm.

8. Albino yellow. Flowers often lack of light, the chlorophyll in the leaves decreases, so that the green color of the leaves slowly disappears, showing albinism, can move the plant to a place with enough sunlight, so that the leaves gradually turn green.

In view of the above points, you can see if your evergreen is caused by the above situation, or other reasons.

Generally, there will be a situation of leaf replacement and new generation, but it is a small number of old leaves.

If there is a lot of yellow leaves, it may be that the fertilizer and water management are not properly managed, resulting in a lack of nitrogen fertilizer or watering too many waterlogged roots. There is also the need to see the sun, and long-term shade will also cause the yellow leaves of the evergreen.

Insufficient temperature. The suitable temperature for evergreens is 15-18. When the temperature is too high in summer, it is best to put it on evergreen plants that are strict with moisture requirements.

In the process of reproduction, it is necessary to grasp the amount of water and follow the principle of "seeing dry and wet". The lack of nitrogen fertilizer in the soil or soil in alkaline basins can also cause the yellow leaves to always be green. This is a relatively rare yellowing of the leaves and may also be infected with insect infestations, which can suck the sap inside the leaves, causing yellowing.

Insecticides should be sprayed as soon as possible. If there are insects in the soil, disinfect or change the soil to avoid reinfection. situation.

It generally appears on the leaves of some green container plants that have been lifted for a long time, because the evergreen pot lacks water, so it is impossible to keep the pot evergreen all the time, causing the leaves to turn yellow, but too much water in the pot will also cause yellowing. It may be a yellow phenomenon caused by poor lighting. Now, it needs to be placed on evergreen leaves.

This may be because the plant is supplemented with very little nutrients during growth, resulting in stunted growth and yellowing of the leaves.

Normally, decaying liquid manure is applied on cada that is evergreen to 20 days old, and the evergreen leaves turn yellow in June-July, probably due to normal metabolism, when the undersides of the leaves turn yellow. Trim the yellow and residual leaves in a timely manner. It could also be that the light is too strong, causing the edges of the leaves to burn.

Pay attention to shade. It could also be that young people like heat and can't stand the cold weather. In winter, if the evergreen plant is foliage in the winter, after it is frozen, we need things, and its growth temperature is the best.

But sometimes green plants also have yellow leaves. What are we going to do? The small series below categorizes the causes and solutions of evergreen yellowing leaves.

If it is lower. For a long time, it causes yellow leaves. A common reason is that a lot of fertilizer is applied.

Many people mistakenly believe that giving more nutrients will make it thrive, but a lot of nutrients are not absorbed by everything. Instead, it damages the roots of evergreen plants. In winter, we must take good measures to keep warm.

The yellowing of evergreen leaves is generally due to insufficient nutrients, high temperature, excessive shade, and unsuitable soil.

Evergreen is a perennial evergreen plant, to raise evergreen, it is necessary to know the growth habit of evergreen, evergreen likes high temperature and high humidity, semi-shaded astigmatism or hidden environment, very afraid of cold, cold in winter is easy to frostbite, below 10 degrees after it is recommended to keep warm, evergreen requirements for soil are not strict, but do not use very clay and alkaline soil, of course, the use of fertile loose, breathable sandy loam soil is the best.

Evergreen generally refers to the genus Evergreen. The genus is a genus of angiosperms in the family Liliaceae, the species of this genus are mostly perennial herbaceous plants, the main characteristics of this genus are that the roots have many fibrous roots, and dense white wool hairs, the leaves are basal and arranged in two rows of nested clusters.

The flowers are fleshy spikes and drawn from the leaf axils, the corolla is often white and saucer-shaped or funnel-shaped, and the fruit is a berry spherical with a single seed. There is only one species in this genus, which is distributed in China and Japan.

There are several reasons that will cause evergreen yellow leaves:

1. Water yellow. Due to the long-term watering caused by the yellow leaves, manifested in the young leaves of the yellow luster, the old leaves have no obvious changes, the roots are small yellow-green, the new shoots are not long, should be watered moderately, the heavy can be depotted, put in the shade to dry the soil and then re-pot.

Second, dry yellow. Yellowing of leaves due to lack of water or too little watering. The old leaves are yellow and shed from the bottom up, but the new leaves generally grow normally. The amount and frequency of watering should be increased appropriately.

3. Fat yellow. Due to excessive fertilization or excessive concentration, the tip of the new leaf appears dry brown, the tip of the old leaf is dry and yellow and falls off, and the general leaf surface is thick and shiny, but most of them are uneven. Fertilizer should be stopped or rinsed with water.

Fourth, lack of fat yellow. Potted flowers are only watered for a long time without watering fertilizer, or do not change pots for many years, the roots are clumped, the plants can not get fertilizer, so that the leaves are yellow, in addition to changing the pot in time, it should be applied diligently with thin fertilizer.

Fifth, burn yellow. Potted flowers and foliage plants that like shade and dampness, such as spider plant, evergreen, one-leaf orchid, hosta arrowroot, etc., such as strong direct sunlight, the leaves often appear yellow tips, should be placed in the shade.

Sixth, alkali yellow. Flowers that like acidic soil, such as azalea mast camellia, osmanthus white orchid, etc., such as potting soil or water quality is alkaline, often cause the leaves to turn from green to yellow, and even fall off. Spraying with 5% ferrous sulfate aqueous solution can make the leaves turn from yellow to green.

7. Damp and hot yellow. Some flowers that are not resistant to high temperature and high humidity are yellowing caused by hot summer, poor ventilation and improper shade. If the Admiralty is hung upside down, the rhododendron has this phenomenon in a hot and humid environment, pay attention to ventilation and cooling, and the potting soil can not be overheated.

8. Albino yellow. Flowers often lack light, the chlorophyll in the leaves decreases, so that the green color of the leaves gradually disappears, showing albinism, can move the plant to a sunny place, so that the leaves slowly turn green.

What's going on with the yellowing of evergreen leaves.

The yellowing of evergreen leaves is mainly due to excessive fertilization, which burns the roots of the plant, causing its poor growth and the leaves turning yellow.

The reason why the leaves of evergreen are yellow.

1. Wannianqing is afraid of waterlogging, can not be watered more, if there is stagnant water, it will affect the root system's coarse sucking, and its leaves will wither.

2. Evergreen prefers a half-object stool to regret the shade environment, afraid of direct sunlight in summer, if you do not do a good job of shading at this time, the leaves will become yellow.

3. The suitable growth temperature of evergreen is between 15-18 degrees, not cold-tolerant, and if the temperature is below 5 degrees in winter, it will cover the frost damage, and the leaves are yellow.

4. Evergreen likes fertilizer, but too much fertilization will cause fertilizer damage, damage the root system of evergreen, and cause yellowing of leaves.

Yellowing of evergreen leaves.

In summer, you need to put the evergreen in the indoor position with astigmatism, avoid strong light exposure, control watering, follow the dry and wet, avoid stagnant water, follow the principle of thin fertilizer and diligent application, can not apply thick fertilizer, and can be moved to a warm place indoors in winter to maintain, pay attention not to be close to the heating.

Prevent yellowing of evergreen leaves.

1. Evergreen likes a moist environment, usually watering an appropriate amount of water, waiting for the soil to be watered again, and maintained in a well-ventilated place after watering every day.

2. Proper shade can be given in spring, summer and autumn, and it can be moved indoors for full sunshine in winter.

3. Evergreen likes fertilizer, and liquid fertilizer should be applied once every half month during the growing season, and fertilization should be stopped during winter dormancy.