What is the reason why the leaves of potted plants turn yellow?

The tip of the new shoot shrinks, the young leaves are yellowish, and the old leaves are getting darker and yellow. The reason is long-term waterlogging, lack of oxygen in the soil, and some fibrous roots rot. Loosen the soil quickly and stop watering and fertilizing.

The dry yellow new shoots and new leaves are normal, and the lower leaves gradually dry yellow and fall off or scorch upward. The reason is that there is no watering or dehydration for a long time, resulting in the aging of the lower leaf branches. The basin soil should be properly watered to keep the soil moist.

The fat yellow new leaves are thick and shiny, but the concave and convex leaves are not stretched, and the old leaves are yellowing and falling off. Fertilizer should be stopped immediately and the amount of water should be increased. Precious flowers and trees can also sow carrots or vegetable seeds in the basin and pull them out after a few days of emergence to consume the fertilizer in the basin.

Hungry yellow has not changed the pot for a long time or the plant is large and the basin is small, the fertilizer and water is insufficient or the whisker root in the basin is too dense, and the lack of light and other reasons lead to tender branches, long nodes, thin and tender leaves and so on. The basin should be changed in time to increase fertilizer and water and enhance the light.

Alkali yellow some flowers that like acid soil, such as camellia, rhododendron, white orchid, branch flower, orchid, etc., cause leaves yellowing or shedding due to alkali in the soil. 0.1% sulfur powder or alum fertilizer water can be added to the basin, or the original basin soil can be changed into peat soil or watered with grass after decay, and the effect is also very good.

Insect yellow disease yellow potted flowers caused by diseases and insects caused leaves yellowing. Such as red spiders and other pests, the leaves show rough dry yellow, mosaic virus harm, yellow spots appear on the leaves, and gradually expand into pieces. This kind of yellow leaves should be picked and burned in time, or controlled by pesticides.

Environmental discomfort causes yellow leaves such as air pollution, improper or excessive use of pesticides, showing leaf tip or local scorched yellow. Flowers that like cool environment encounter high temperature and humidity in summer and have poor ventilation, which can easily lead to leaf yellow shedding. Such as gentleman orchid, upside down hanging golden bell, orchid and so on, all have this phenomenon in summer.

However, in some cases, the appearance of yellow leaves in potted flowers is also a normal phenomenon, such as orange, white orchid, jasmine and other germinated branches, the old leaves are yellow, the flowers and trees are malnourished after transplanting, and a small amount of yellow leaves fall off because of the dense outer branches and leaves and insufficient light in the inner chamber of the plant. it is a normal phenomenon that deciduous flowers and trees turn yellow and wither due to the arrival of Frosts Descent.

What is the reason why the leaves of potted plants turn yellow?

Potted plants are very common in our daily life, and we often see potted plants with yellow leaves. What is the reason for this?

Potted plants should be properly watered and adhere to the principle of "dry and wet, watering thoroughly". If you water potted plants too much, it is easy to cause long-term water in potted soil, so that the roots suffocate and rot and cannot absorb water normally. this leads to the yellow pages of potted plants and even fall off. If you find yellow leaves, you should stop watering, loosen the soil and let it ventilate and dry.

Lack of water

Flowers, such as lack of water leaves drooping, should immediately spray water on the leaves to speed up the absorption of water, and then water into the basin, at this time pay attention to less watering to make the soil moist, do not water more.

Improper fertilization

In potted peanuts for a long time, long-term non-fertilization or insufficient fertilization will cause leaf yellow phenomenon; apply too much concentrated fertilizer, flowers can not absorb the root burn, can not absorb water will also cause leaf yellow withering, once a week in summer thin fertilizer, do not apply more thick fertilizer. If you apply too much fertilizer, you can pour more water to dilute and flush the fertilizer out of the soil. Lack of fertilizer can lead to basin soil hardening, flowers and leaves yellow, thin, thin, branches slender yellow tender. Should be fertilized immediately, effective within a week, can be fertilized on time, so that the normal growth of flowers, more flowering.

The temperature is too high

In the summer high temperature season, cool and shade-tolerant flowers can easily cause scorch on the tip or edge of young leaves in high temperature and strong light. In this case, it is necessary to move them to a shaded and ventilated place in time, spray water to cool down, and increase humidity is beneficial to flower growth.

Alkali is big

Due to the long-term watering of potted flowers, saline-alkali is accumulated in the potted soil, and in serious cases, there is an alkaline shell on the potted soil, which makes the flowers and leaves fall off. The method is to change new soil or spray ferrous sulfate solution to the leaves to neutralize, using alum fertilizer water and fermented rice washing water, can achieve better results, but do not apply more, such as ferrous sulfate fertilizing too much, the leaves are also yellow, but do not fall off, at this time should be properly watered alkaline water to adjust.

Air drying

Some flowers cultivated in the north that like the humid environment in the air. Such as camellias, orchids, etc., excessive drying of the air will often lead to leaf tip drying, leaf edge scorching or scorched spots on the leaves. The edges are curled, wrinkled, brown and other symptoms. Especially in the areas where coal fire and heating are used indoors in winter, the disease is more serious. At this time, branches and leaves should be sprayed and washed with water similar to room temperature, so as to increase air humidity. Families growing flowers on the balcony in summer can sprinkle water on the ground of the balcony. Make the local environment moist and have cooling effect.

Big flowers, small pots.

As large flowers have many roots and require more water and fertilizer, small pots can not meet the needs of flower growth. At this time, the old leaves are often dry and yellow, while the tender leaves are yellow and thin. To change the appropriate pots, 30% humus soil should be added to the soil to make the flowers grow normally.

The branches and leaves are too dense

The luxuriant growth of branches and leaves and long-term unpruning make the inner hall branches and leaves lack of light and appear the phenomenon of leaf yellow shedding, so we should strengthen pruning to make the inner hall ventilated and fertilize properly.

Lack of light

Cultivation

Sexual love sunshine flowers, such as rose, pomegranate long-term placed in the light is too weak, the plant will gradually weaken, the leaves are thin and yellow, not flowering or less flowering.

Suffer from cold

As the spring flowers come out of the room early by the wind cold, or autumn cold, so that the flowers suffer from frost damage and yellow leaves, to enter the room to keep warm and strengthen the cold resistance exercise of potted flowers in advance.

Disease and insect damage

After being infected by mosaic virus, yellow and green plaques appear on the leaf surface, and leaf spot disease is caused by fungi and other bacteria, which is easy to cause local necrosis of leaves. Attention should be paid to disease prevention, timely spraying and adequate light and ventilation. It is easy to produce insect pests in the high temperature season in summer, so it is necessary to spray to prevent them, such as aphids and red spiders, to absorb nutrition and water on the back of the leaves, so that the leaves of the whole plant will wither and yellow, and the leaves of the whole plant will wither and fall off.

Other

When flowers are poisoned by toxic gases in the atmosphere, or when the temperature is high, sudden pouring of cold water will cause physiological drought. Spraying high concentration pesticides to control diseases and insect pests will cause local scorch of leaf tip or leaf surface, or even death of the whole plant. Therefore, attention should be paid to eliminating air pollution sources, or planting pollution-resistant plants, rational use of pesticides, hot summer before 10:00, after 4 pm watering is appropriate.

Tip: if you want to know more about seedlings, please go to Northwest Seedling Network for information. Source of this article (Seedling Wholesale Network)

Causes of yellowing of leaves of potted flowers

There are many reasons for the yellowing of leaves of potted flowers. The main reasons are as follows:

Water drought and waterlogging lead to leaf yellow: flowers lack of water and leaf color is dry yellow; too much water is easy to make flowers rot roots, so that flowers can not absorb water and fertilizer, leaf yellow finally fall off to death.

Light exposure to leaf yellow: if the sun is strongly exposed, it will burn the flowers and leaves and turn them yellow.

Leaf yellow caused by excessive fertilizer and lack of fertilizer: heavy fertilizer is applied too much to burn the roots, so that they can not absorb water, and the leaves become withered and fall. Similarly, the flowers and leaves are yellow and thin, and the branches are slender and tender.

Alkali soaking leaf yellow: due to long-term watering of potted flowers, saline alkali is accumulated in the basin. In severe cases, there is an alkaline shell on the potted soil, which makes the flowers and leaves fall off. In particular, soil and water in the north contain alkali. The method is to replace the new soil or neutralize the ferrous sulfate solution.

Acidity and lack of acid lead to leaf yellow: some flowers like acidity, if the PH value is more than 7, the veins of the new leaves turn yellow at first, the edges of the old leaves wither and finally wither and die.

The leaf yellow caused by the small pot container: the plant has many roots and needs more water and fertilizer, and the small pot can not meet the needs of flower growth. The old leaves of the plant show dry yellow but no luster, and even the young leaves turn yellow.

Cold wind and low temperature lead to leaf yellow: if flowers come out of the room too early in spring, they are easy to catch cold and wind, freezing flowers and turning leaves yellow.

Diseases and insect pests leaf yellow: such as powdery mildew, brown spot, make the leaves yellow and withered. For example, whitefly, red spider and mites absorb nutrients and water on the back of the leaves, which can also cause the leaves to wither and yellow.