Why is it that winter leaves are yellow?

Azaleas are very beautiful, and sometimes the leaves turn yellow. Why do azaleas lose their leaves in winter? What's with the yellowing of the leaves?

Why do azaleas lose their leaves in winter:

1. Soil causes

Rhododendron is a kind of plant that likes acidic soil, continuous watering will make the soil alkaline, which is not conducive to its living conditions, and leaves will naturally fall off, so when choosing soil, we should choose acidic soil and add some fertilizer appropriately to maintain the acidity of its soil.

II. Seasonal changes

With a sudden change in the weather, plants are instinctively protected, reducing moisture in the body, resulting in fallen leaves, which automatically recovers after a period of time.

Third, watering

Improper watering will also cause leaves to fall. Water evaporates slowly in winter, and too much watering will also lead to fallen leaves.

IV. Environmental factors

When we cultivate cuckoos, we must maintain the humidity of the environment and keep the soil slightly wet, but we can't let the cold wind blow directly at it. Don't rush to change soil and fertilize. In winter, we should also give it enough light and put it under the south window as far as possible during indoor maintenance. The temperature of the environment should not be lower than 5 degrees. Do not change places at will to prevent its temperature from changing. But you can't put it in a place where the air is cloudy.

5. Improper fertilization

If you do not fertilize properly, it will also easily cause problems with the leaves, you know, the physiological activity of the plant will be weakened in winter, if the concentration of fertilizer is too high, it will be easier to let its leaves fall. So we have to apply a little thin liquid fertilizer at this time.

What happened to the yellowing of rhododendron leaves:

1. Soil partial alkali

The land and water in northern China contain a lot of alkali, and azaleas need to grow in a sour environment, and if there is a lack of soluble iron in the water, azaleas are prone to yellow leaves. The best solution is to add ferrous sulfate solution or particles to the soil, which can not only supplement iron, but also make the soil sour, killing two birds with one stone.

two。 Improper lighting

Azaleas like cool and cool growth environment, but if they are kept in shade for a long time, or if the light is too strong, it will lead to azaleas growing branches and leaves, thin and yellow leaves, no flowering or even less flowering. At this time, it is necessary to move the azaleas to the sun or shade in time to cultivate them, and it is best to give the azaleas a fixed time to bask in the sun.

3. Excessively stimulating

Plants, like animals, cannot be strongly stimulated. Of course, the stimulation here does not refer to the kind of stimulation such as shock, but the stimulation to plants, including excessive concentration of drugs to control diseases and insect pests, sudden changes in temperature, and so on, which will cause the leaves of azaleas to turn yellow and scorch. Therefore, in the process of breeding, it is necessary to make rational use of pesticides to reduce unnecessary air pollution, and pay attention to give azaleas a relatively stable temperature to grow in the changeable temperature season.

4. Temperature effect

The suitable growth temperature of rhododendron is 15 ~ 25 ℃, and the winter temperature above 10 ℃ can pass the winter safely. However, the weather is changeable in winter. if it is not moved indoors in time or there is a cold wind blowing directly, the cuckoo is very vulnerable to freezing damage, resulting in yellow leaves and, in serious cases, withering and dying. Therefore, in the middle of October every year, the cuckoo will be moved to indoor maintenance, put in the sunny place, and the room temperature will be controlled at about 10 ℃.

All right, that's all for the reason for the yellowing of azaleas leaves, boys and girls.

It's almost New year's Day, and your flowers are still yellow and deciduous. What should we do?

Cuckoo

(author: lavender Source: Sina blog)

Azaleas are one of the first choices for Chinese New year flowers. Put a pot of azaleas in full bloom at home during the Spring Festival. Friends and relatives come with face, but it is not good for the leaves to turn yellow.

(author: Lao Niu ugly source: Sina blog)

First cause: improper watering

The newly bought rhododendron leaves turn yellow, mostly because of improper watering, either too much or less.

The correct watering method of azaleas should be dry and wet, that is, when the 2~3cm on the surface of the basin soil is dry, it should be watered thoroughly. At ordinary times, you should also spray water on the cuckoo leaves and around them to increase the humidity of the surrounding air.

Secondary cause: the temperature is too low

Rhododendron is a southern flower, which is not resistant to cold. If the winter temperature is kept at 5: 10 ℃, below 5 ℃, the rhododendron will stop growing.

Therefore, if there is no heating at home and the temperature is very low in winter, Huahua is not recommended to buy cuckoos.

(author: Yu Shuilan Ling Source: Sina blog)

Camellia

(author: fcm1987 Source: Niitu.com)

There are also many flower friends like camellias, but raised at home only to find that the leaves are yellow, how is this going on?

(source: Jinhua News Network)

First cause: improper watering

Watering is indeed a big problem, and camellias are often overwatered. Camellias need to be watered less in winter to keep the soil dry. If the temperature at home can reach more than 20 ℃, then watering can be dry or wet.

Secondary cause: insufficient elements

Some of the trace elements needed in the growth of camellias can also cause the leaves to turn yellow if they are not satisfied.

At this time, you can fertilize, with 20%-30% bean cake fertilizer, once a month, or usually add a small amount of ferrous sulfate when watering, note, 1-2 drops at a time.

(author: wenxiong34d Source: Pacific computer Network)

Longevity flower

(author: flower and insect source: home is in Shenzhen)

Longevity flowers can be said to be one of the super easy-to-raise plants, but there are still flower friends who yellowed the leaves of longevity flowers. What is the reason? Just listen to the details of the flowers.

(author: drunk cat z Source: China Landscape Photography Network)

The first cause: natural metabolism

Flower friends can first observe that if only the leaves at the bottom of the longevity flowers turn yellow, but there is no problem at the top, it is normal metabolism. Flower friends just need to remove the yellowing leaves.

Secondary cause: too much watering

If the leaves soften first and then turn yellow, it is waterlogged.

You can take the longevity flowers out to bask in the sun, wait for the leaves on the edges to dry, and then cut off the dry parts with scissors. The leftover leaves will heal themselves in a few days, and the new buds will grow slowly.

(author: LF680410 Source: flower Bar)

Orchid

(author: yangyang Source: Pacific computer Network)

Do not know how many orchid flower friends, many people think that orchids are not easy to raise, in Huahua's view, there are no bad flowers, only those who are willing to work hard or not!

(author: nbmeid Source: 19th floor)

The first cause: environmental discomfort

If it is a newly bought orchid, then the leaves are yellow, probably because of the inadaptability to the environment, temporarily affecting the nutrient absorption of orchids, will be yellow leaves.

Cut off the yellow leaves and take care of them normally.

Secondary cause: improper watering

Whether the orchid is short of water or waterlogged, it will cause the leaves to turn yellow. if even the tender leaves turn yellow, it means that they are overwatered, while if they start yellowing from the leaves below, and then continue to spread above, it means that they are too little watered and dry.

If you water too much, you can move the orchid to a place with good light and ventilation, which can speed up the evaporation of water.

If it is too little watering, it should be watered, pay attention, watering must be thoroughly watered, that is, you can see the bottom of the small hole out of water.

(author: overseas fisherman Source: Huitu net)

Make a fortune tree

It is possible that most of the flower friends who buy the fortune tree are for a good sign, but it is also very depressing that the fortune tree likes yellow leaves.

The first reason: too much watering

The root system of the rich tree is underdeveloped. once it is overwatered, it is easy to rot the root, and once the root is rotten, the leaves will turn yellow.

Insert along the edge of the basin with small iron bars and so on, gently mix the basin soil to accelerate the volatilization of water in the basin soil, and then wait until the surface of the basin soil is dry, whiten and then water it thoroughly at one time.

Phalaenopsis

Phalaenopsis is a must-buy flower for the Spring Festival. Oh, it is not only beautiful, but also has a very good meaning. It couldn't be better to give it away!

The first reason: the temperature is too low

Phalaenopsis is a tropical flower, which requires a high temperature. The best growth temperature is 18-28 ℃. If the temperature is lower than 15 ℃, it will affect the growth of Phalaenopsis.

Secondary cause: improper watering

Even the young leaves turn yellow, it means there is too much water, and if the top and the new leaves are all right, the old leaves below turn yellow, indicating that they are too little watered for a long time.

If you water too much, you can use a piece of cloth under the nutrition bowl, you can slowly suck the water out, or gently turn up the surface basin soil, so that the soil contact more air, accelerate water evaporation.

If it is less watered, it should be thoroughly watered once, and then it should be watered thoroughly when the surface of the basin soil is dry and white.

Gentleman orchid

(author: Hu Xiqing Source: Wuhai Photography Network)

Gentleman orchid is a perennial plant, if raised well, it can even blossom year after year, but the call sign is raised, and the yellow leaves are not discussed.

Main cause: improper watering

If the leaves of Cymbidium start yellowing from the tip of the tender leaves, and then gradually develop downward, it means that the water is too big, and if the tips of the old leaves are yellow, it is lack of water.

Lack of water can be used to soak the pot, put the magnolia with flowers into a large basin filled with water, wait until the surface of the basin soil is wet and then take it out, the magnolia will be thoroughly watered.

If it is too much watering, loosen the soil, be careful not to hurt the root system of the orchid, and then put it in a well-ventilated place with balcony lights to speed up water evaporation.

Secondary cause: lack of light

Lack of light will also cause the new leaves of Magnolia to be bright yellow, especially in winter, the light is relatively weak, so move the orchid to a place with good light in time.

Cyclamen

(source: 360 Encyclopedia)

Cyclamen is also called radish flower, and it is also one of the flowers chosen by everyone during the Spring Festival. Oh, look at its petals, is it like rabbit ears?

(source: triple connection)

Main cause: air drying

Cyclamen like water, the perception of water is also very obvious, at the same time, the requirements of air humidity is also relatively high, once the moisture can not meet the requirements, yellow leaves wilting is not discussed!

Keep cyclamen's potted soil moist indoors, spray more around it, and increase air humidity.

Secondary cause: lack of light

Although cyclamen is afraid of bright light, if cyclamen is put in a place where the light is insufficient for a long time, it will also have yellow leaves!

The light in winter is neither sufficient nor strong, so put cyclamen in a place where the light is brighter.

(author: Weieyi Bo Ma Source: Baidu knows)

Culture methods and matters needing attention of family potted rhododendron

Rhododendron, also known as rhododendron, pomegranate and rhododendron, is a deciduous shrub and deciduous shrub of the rhododendron family. There are about 900 species of rhododendron in the world. China is the country with the largest distribution of rhododendron, with more than 530 species. Rhododendron is one of the top ten traditional flowers in China.

Soil requirement

If you want azaleas to bloom beautifully, you should first be familiar with the soil in which azaleas grow. The pH value is between 5.5 and 6.5. Do not use alkaline or clayey soil. The suitable growth temperature is 12 ℃ to 25 ℃, shade and sunscreen in summer and frost protection in winter. It is best to move indoors. According to the details introduced above, the azaleas will bloom very beautifully if they are cultivated carefully. Cuckoos like fertile soil. The cultivation of rhododendron is the most suitable for the acid humus soil which has been used for many years. Clay permeability is poor, poor drainage, not suitable for use, especially the soil containing lime must not be used.

Fertilization method

When topdressing, do not pursue alkaline fertilizer and water. Burying lard and other oils into the soil after rancidity can make the cuckoo grow vigorously, blossom more and have bright colors. Correct use of nitrogen, phosphorus and potassium fertilizers. Nitrogen fertilizer is sufficient, leaves are thick green, and the growth is exuberant. Insufficient nitrogen fertilizer, light and dull leaves, thin and old leaves, short and thin branches, few flowers and too much nitrogen fertilizer will lead to overgrowth. The phosphate fertilizer foot plant is strong, with many flowers and bright colors. Phosphorus deficiency, few and thin branches, thin petals and short flowering period. When lack of potash fertilizer, the rhododendron branches are slender and the tissue is soft. It is appropriate to apply more nitrogen and potassium fertilizer when young trees and more phosphorus fertilizer when mature trees. If the soil has been alkalized, causing the leaves to lose green and turn yellow and white, ferrous sulfate should be applied. Fat and water should not be thick. Apply thin fertilizer diligently. Excessive concentration of liquid fertilizer will burn the roots and damage the plants.

Moisture requirement

1. Cuckoos are afraid of dryness and waterlogging. If the cuckoo pot soil is too much, the root will shrink, first the leaves will droop or curl, then the tip of the young leaves will become scorched yellow, and the serious ones will not recover for a long time and die day by day. The basin soil is too wet, the ventilation is small, causing rotten roots, the light leaves are yellow and early, the growth stops, and the heavy ones die.

2. If the cuckoo pot soil is too dry and causes root damage, the salvage method is to soak the roots in the water, put them in a cool place, and spray water on the leaves many times. If the yellow leaves fall early due to excessive humidity, the damaged plants should be placed in a ventilated place, the frequency and amount of watering should be controlled, and fertilization should be stopped to prevent disease and insect infection.

3. Cuckoos like humid environment, so they should always pour some water around the basin and on the leaves to keep the surrounding environment moist. If the surrounding environment is dry, cuckoos are very susceptible to disease. The rescue method is to put the sick cuckoo into the pit under the grape and other trees, covered with glass, the pit is often sprayed with water, the grape branches and leaves can penetrate oblique light, and the diseased flowers will slowly return to normal.

Light management

Cuckoos should bask in the sun more after budding, but pay attention to avoid direct light during flowering. The strong light will dilute the flowers and make the flowers wither earlier. Scattered light is required and good ventilation is required.

Matters needing attention

1. The roots of azaleas are as thin as hair, and there are few thick taproots. They are afraid of both dry and wet, especially heavy fertilizer. If too much watering, the root is soaked in water, too dry, branches and leaves atrophy, leaf petal fall off, a great threat to the plant, as for watering heavy fertilizer, it will be life-threatening.

2. after the flower fade, the residual flowers must be cut off to avoid fruiting and wasting nutrition. after the new branches germinate, they should be thinned properly and stay according to the growth of the plant.

3. Rhododendron is most suitable to be planted in muddy basin, because the mud basin absorbs water and breathes air, which is beneficial to the growth and development of roots and luxuriant branches and leaves.

4. Potted azaleas should be placed on the southeast balcony and should be ventilated and moved as little as possible. If it is not ventilated, it is easy to suffer from black spot disease and a large number of fallen leaves.

5. Cuckoos should also have moderate requirements for light, and avoid direct light in summer. Fertilization should grasp the application of thin fertilizer frequently, can be light but not strong, and apply organic compound fertilizer on the basin soil once a month. Potassium dihydrogen phosphate was sprayed every 10 days for extra-root fertilization. Timely watering, you can also put edible vinegar in the water to increase acidity.

6. timely thinning of buds and leaves, removing part of the buds and leaves that have grown too much and too dense, so that the air is well ventilated and nutrients are concentrated on the buds. After the formation of buds, it is necessary to increase nutrition and apply more phosphorus and potassium fertilizer, otherwise the buds will be transformed into leaf buds.

7. The main reasons for azaleas falling leaves and not blooming are: too much direct light in summer, frostbite, too much watering, too thick fertilization, too long indoor time, poor air circulation or dark and humid places, acid rain, and so on. so these situations should be avoided in the process of maintenance.

8. Turning the basin and changing the soil do not need to be carried out every year, usually once every 2 to 3 years, with as little damage to the roots as possible. The time should be after the blossom fade or in autumn, and topirazine should be sprayed at the same time to prevent diseases.

9. The pests of azaleas are mainly red spiders and aphids, which can be sprayed with permethrin, and the effect is better, such as not dying after three days, spray again. The disease is mainly black spot, which is caused by muggy environment and lack of light. Measures can be taken to promote air circulation on the one hand and spray Bordeaux solution and carbendazim on the other.

10. The propagation method of rhododendron is mainly cutting. Before and after Grain in Beard, select new branches, 5 cm to 10 cm long, cut off at the bifurcation point, peel off the lower leaves, leave 3 to 4 top leaves, insert the 1x3 of the branches into the soil, spray enough water, and cover with plastic film. It is necessary to strengthen the management at ordinary times and transplant a year later.