What is the reason for the yellowing of flower leaves

What is the reason why the leaves of flowers turn yellow? The phenomenon of yellowing of leaves often occurs in the growth process of potted flowers, and there are many reasons for yellowing of leaves, and sometimes it is the result of the joint action of many reasons. therefore, in the process of maintenance, it is necessary to carefully observe the causes of yellowing of flower leaves. in order to be targeted to prevent and cure.

(1) Water yellow: long-term watering too much is easy to cause leaves yellowing, especially in young leaves yellowing without luster, old leaves have no obvious change, small branches, new shoots atrophy not long. At this time, watering should be controlled or stopped. If the situation is serious, the plant can be taken out of the basin with soil, and then planted in the basin after blowing in the shade.

(2) dry yellow: the leaves turn yellow due to lack of water or less watering. The general situation is that the old leaves wither and fall off from the bottom up, but the new leaves generally grow normally. In this case, the amount of water and times of watering should be increased appropriately.

(3) Fat yellow: when fertilizing too much or the concentration of fertilizer is too high, the leaf tip of the new leaf will appear dry brown, while the leaf tip of the old leaf will fall off. At this time, fertilizer should be stopped immediately, or irrigated with clear water to dilute the fertilizer.

(4) thin yellow: potted flowers do not apply fertilizer for many years, or do not change pots for many years, so that the root system clumps, the plant can not get nutrients, and it is easy to cause leaf yellowing. In this case, you can change the basin in time, usually thin fertilizer and diligent application.

(5) tanning: some flower species like shade, especially foliage plants, if placed in the strong sunlight, the leaves will appear yellow tip and brown edge phenomenon, at this time to immediately move the plant to the shade place.

(6) Alkali yellow: acidic soil flowers, such as rhododendron, gardenia, camellia, magnolia, etc., will cause leaves to turn yellow when the quality of cultivated soil or watering is alkaline. The solution should be immediately switched to acid soil cultivation, or timely spraying 0.2% ferrous sulfate solution.

(7) damp yellow: some flowers that are not resistant to high temperature and high humidity often cause yellow leaves due to poor ventilation and poor shading in hot summer. At this time, attention should be paid to ventilation and cooling, while keeping the basin soil slightly dry.

(8) Cold yellow: in the cold season, because the temperature is too low, the leaves of some flowers that require higher overwintering temperature are also easy to turn yellow. Even shedding, attention should be paid to maintaining the ambient temperature of the cultivation site.

(9) Disease and pest yellow: there is also a phenomenon of yellowing and shedding of leaves in flowers harmed by diseases and insect pests. Different control measures should be taken according to the causes of different diseases and insect pests.

(10) deficiency yellow: if gardenia is prone to yellowing of leaves and gradual weakening of plant growth in the case of iron deficiency, it can be treated with 0.3% ferrous sulfate solution. The above is the reason for the yellowing of flower leaves.

What about the yellowing of flower leaves? the reasons for the yellowing of 11 kinds of flower leaves.

The causes of flower leaf yellowing are water yellow-dry yellow-light-hungry yellow-fat yellow flower leaves yellowing, but also affected by soil pH, diseases and insect pests, drug damage, smoke and dust, humidity, imbalance of trace elements in soil, poor ventilation and other factors can also cause leaf yellowing. As for the metabolism of branches and leaves, the temporary imbalance of nutrient water after transplanting and the withering of leaves during dormancy are normal physiological phenomena of plants. The following common leaf yellowing analysis

Common causes of yellowing of flower leaves 1. Overwatering

The basin soil is too wet for a long time, which causes anoxia in the soil, causes some fibrous roots to rot, hinders normal respiration and absorption of water and nutrients, and causes leaves to turn yellow and fall off. After the injury, the young leaves turn pale yellow, and then the old leaves gradually turn yellow. watering should be controlled immediately, fertilization should be suspended, and the soil should be often loosened to make the soil well ventilated.

2. Drought dehydration

Flower cultivation leakage watering or long-term watering half waist water (that is, upper wet and lower dry) will affect nutrient absorption, and it is also easy to cause dull and dull leaves and drooping leaves. First, the lower old leaves aged, and gradually withered and yellowed off from the bottom up. At this time, a small amount of watering and spraying is needed to gradually recover and then turn to normal watering.

3. Lose weight for a long time

There is no application of ammonia fertilizer or no change of soil for a long time, and there is a lack of nitrogen and other nutrients in the soil, resulting in thin branches and leaves and thin and yellow leaves. It is necessary to pour the pot in time and gradually apply rarefied mature liquid fertilizer or compound flower fertilizer into new loose and fertile culture soil.

4. Excessive fertilization

If you fertilize too much, the new leaves will be thick and uneven, and the dry tips of the old leaves will fall off. You should immediately stop fertilization and increase the amount of water to make the fertilizer flow out from the drainage hole at the bottom of the basin, or immediately pour the pot, rinse the soil block with water and then plant it again into the basin.

5. Hot and high temperature

In summer, if you put cool flowers (such as cyclamen, Golden Bell upside down, four Seasons Begonia) in a high temperature place to let the strong light shine directly, it is very easy to cause the young leaf tip and leaf edge to scorch, or the leaf yellow to fall off. Move to a well-ventilated shady place in time.

6. Excessive covering of yin

If the sun-loving flowers are kept in shade or lack of light for a long time, it will cause the branches and leaves to grow, the leaves are thin and yellow, and they do not blossom or rarely bloom. Be careful to move the flowerpot to the sunny place.

7. Alkalinity of soil and water

There are more saline and alkali in soil and water in most areas of northern China, and flowers with acid-like soil are planted, such as rhododendron, camellia, Michelia, gardenia, orchid, magnolia, sweet-scented osmanthus and so on. Due to the lack of soluble iron and other elements that can be absorbed by the soil, the leaves will gradually turn yellow. Acid soil should be selected when planting, and alum fertilizer and water should be often watered during the growth period.

8. Airtight

If too much nitrogen fertilizer is applied, the branches and leaves will grow luxuriantly, coupled with the long-term unpruned, resulting in insufficient light in the inner chamber branches and leaves, which is easy to cause the leaves to yellowing and falling off. Reasonable fertilization should be applied and pruning should be strengthened to make it ventilated and transparent.

9. Air drying

When the indoor air is too dry, some flowers that like the humid environment, such as hanging orchids and orchids, often appear leaf tip dryness or leaf edge scorching and so on. Attention should be paid to water spraying, plastic film cover and other methods to increase air humidity.

10. Improper temperature

If the room temperature is too low in winter, the flowers are often vulnerable to cold damage, which leads to the yellowing of the leaves and death in severe cases. If the room temperature is too high, the transpiration of the plant is too high, and the root water and nutrients are in short supply, the leaves will turn yellow. Please pay attention to adjust the room temperature in time.

11. Soil partial acidity

It is easy to lose acid and magnesium in southern red loam. planting flowers and trees with alkali-tolerant or mute soil, such as oleander, yellow poplar, Yingchun, etc., are often prone to green and yellowing between the veins of old leaves. Can apply calcium magnesium phosphate fertilizer or spray magnesium sulfate solution.

What is the reason for the yellowing of the leaves? what about the yellowing of the leaves?

The orchid is a very common indoor plant, which can beautify the environment and purify the air at home, but if the orchid is sick, the owner should pay attention to it. This article introduces what is the reason for the yellowing of orchid leaves, and how to do it?

The first reason: excessive fertilization, more than the demand of the plant, the leaves will appear bright and uneven after fertilization, and then the root system will appear yellow due to malnutrition after partial decay.

Treatment: so at this time should stop fertilizing, more watering, or rice basin to wash the roots, change the new soil is also a very good way. It can be seen that the spatial soil liquid concentration is very important.

Reason 2: the soil has not been turned over for a long time, and the soil is hardened, when all the nutrients in the basin are exhausted. The deficiency of the three most important elements, nitrogen, phosphorus and potassium, makes the leaves gradually turn yellow.

Treatment: at this time, you should change the soil or replace it with fertile loam and fertile water.

Reason 3: the hanging orchid is a semi-shade flower, but it also needs light, so you should ensure at least 4-5 hours of light every day. Otherwise, the leaves will turn yellow when the chlorophyll decreases.

Treatment: the best way is to put it under the indoor incandescent lamp or on the balcony.

Reason 4: the air permeability and water permeability of basin soil are not good, which leads to long-term stagnant water in basin soil and difficulty in root respiration, so the leaves turn yellow naturally.

Treatment method: at this time, we should loosen the soil and control moisture in time. Fifth, it is impervious to water for a long time. The roots of Cymbidium lose water, and the lower old leaves turn yellow. It should be watered thoroughly to keep the basin soil warm and moist.