What to do about the withered leaves of loose-tailed sunflower? the causes of yellowing of loose-tailed sunflower leaves and its solutions

Because loose-tailed sunflower is a kind of foliage plant, the most fear of planting loose-tailed sunflower is that the leaves turn yellow and dry, which not only affects the appearance and beauty of the whole plant, but also strongly represents the growth state of loose-tailed sunflower. Once there is a phenomenon such as yellowing and drying up, it shows that the life of loose-tailed sunflower may be dangerous.

What if the loose-tailed sunflower leaves are dry?

1. Dry scorch of loose-tailed sunflower leaf tip-- the air is too dry

Loose-tailed sunflower likes a higher air humidity, in breeding, if the air is relatively dry, then it is easy to appear leaf tip dry scorch phenomenon, and the focal edge.

During the growth period, it is necessary to keep the loose-tailed sunflower with high air humidity, and spray water on the leaves and around it every day, which can increase the air humidity, but be careful to stop watering when the plant is dormant.

2. Dry scorch of loose-tailed sunflower leaf tip-- the sunshine is too strong.

In the cultivation of loose-tailed sunflower, it is necessary to maintain appropriate light, in summer, the light is relatively strong, it is best to cultivate loose-tailed sunflower in a semi-shady environment, too strong light or strong direct light will lead to scorched tip or scorched edge of the leaves of loose-tailed sunflower. So in the summer, it is best to avoid sunflower direct light, put it in the semi-shade, pay attention to shade.

3. Dry scorch of loose-tailed sunflower leaf tip-basin soil is too dry

Too little watering causes the basin soil to be too dry, which is also one of the reasons for the dry scorch of loose-tailed sunflower leaf tips. During the growth period of loose-tailed sunflower, it is necessary to ensure that there are enough ten points, and the pot soil is dry for a long time, so it is difficult for the plant to absorb enough ten points, resulting in dry scorch of its leaf tip, so it must be watered properly.

4. Dry scorch of loose-tailed sunflower leaf tip-basin soil is too wet

Relatively speaking, the potted soil of loose-tailed sunflower should not be too wet. once in the process of breeding, the watering is too much, the basin soil is too wet, and stagnant water appears, which will hinder the breathing of the roots, make the roots rotten, and lack of water inside the plant. and then make its leaf tips dry and scorched.

5. Dry scorch of loose-tailed sunflower leaf tip-- fertilization is too thick.

Excessive fertilization will mainly lead to a root burning problem, root problems and the plant will lose water, when the degree is relatively light, it will lead to leaf tip dry scorch, serious root rot. Therefore, when applying fertilizer to sunflower, we should pay attention to the concentration, and thin fertilizer is better.

In addition, if it is winter to raise loose-tailed sunflower indoors, it is best to principle air conditioning and heating, so as to prevent the plant from being scorched.

Causes of yellowing of loose-tailed sunflower leaves and its solution

1. Soil discomfort

Indoor potted sunflower should choose acidic soil, the acidity of the soil is not enough, which will affect the absorption function of the root system and cause the leaves to turn yellow.

Loose-tailed sunflower is suitable for sandy loam cultivation, if the potted soil is too sticky, it will cause part of the root system to rot at the end, then the leaves begin to yellowing, and the plant grows poorly or even dies.

2. Improper transplantation

Transplanting upper pot is an important step for families to plant sunflower, and improper operation will lead to yellowing of plant leaves. When potting, it is necessary to remove the outer part of the root system, but the outer root system is the main root system of root respiration. if it is damaged by improper operation, the plant nutrition supply can not be supplied, and the plant will gradually gaunt and die. And the sign of death is that the leaves turn yellow and droop.

3. Overwatering

Loose-tailed sunflower is higher, and the nutrients needed by leaves depend on root transport. Proper watering can quickly absorb the roots and keep the leaves green, but if the basin soil is too wet, it will affect the root respiration, affect the root water absorption, and directly cause the leaves to yellowing.

4. Too little watering

It is no good to water too much or too little. Sunflower needs sufficient water during its growth. When the basin soil is dry for a long time, because the growth of the plant does not get enough water, the leaves will begin to turn yellow and wither.

5. Humidity is too low

The growth of loose-tailed sunflower needs higher air humidity, and when the air is too dry, the leaves will slowly turn yellow. Water should be sprayed on the leaf surface and the surrounding environment 3 or 4 times a day throughout the growth period to increase air humidity. However, watering should be stopped after dormancy (after winter).

6. The temperature is too low

Loose-tailed sunflower likes to be warm, and it is necessary to do a good job of heat preservation and anti-freezing in winter. generally, about 10 ℃ can survive the winter safely. if the temperature is too low, the plant suffers frost injury, the leaves turn yellow and the leaf tip dries up, which leads to root damage and affects the growth of the coming year.

7. The sun is too strong

The growth of sunflower needs plenty of sunlight, but it needs proper shade from May to September. During this period, excessive light can easily lead to plant leaf burns, which is what we often call sunburn. The leaves appear yellow spots and become scorched and yellowed. Over time, the whole plant will wilt. So in summer, the plants should be kept under shade sheds or big trees to avoid direct sunlight.

8. Pest infection

Leaf mites and shell insects are relatively common pests in loose-tailed sunflower. When leaf mites or shell insects grow in the leaves of loose-tailed sunflower, pests cause damage to plants, and loose-tailed sunflower will begin to turn yellow. If you do not take measures such as spraying, loose-tailed sunflower will die slowly.

The solution to the sagging of sunflower leaves

1. Replenishing light and watering

Move the loose-tailed sunflower to the ideal place for maintenance, and if you encounter continuous rainy days, you can make up the light manually to ensure sufficient sunshine.

Timely watering, loose-tailed sunflower leaves drooping after watering can restore the original state.

2. Increase temperature and control fertilizer

Move the sunflower to a warm place, which can appropriately increase the indoor temperature in winter.

Control the amount of nitrogen fertilizer application, and appropriately increase the application of phosphorus and potassium fertilizer to ensure adequate nutrients.

The habit of sunflower

Sunflower is a tropical plant, which likes warm, humid and semi-shady environment. The cold tolerance is poor, and the leaves turn yellow when the temperature is below 20 ℃. The winter temperature above 10 ℃ can safely survive the winter, and the temperature will freeze to death when the temperature is 5 ℃.

The seedlings of loose-tailed sunflower grew slowly and grew rapidly after growing into young plants. Suitable for loose, well-drained and fertile soil. Thick branches and leaves, evergreen all the year round, strong shade tolerance.

Loose-tailed sunflower cultivated outdoors in northern China generally enters the room from late September to early October and must be placed in a place with sufficient sunshine. During the overwintering period, the room temperature is 23-25 ℃ during the day and 15 ℃ at night, and at least 8 ℃ must be maintained, otherwise it will be frozen, resulting in death in winter and spring. During the overwintering period, attention should be paid to regularly scrubbing or spraying a small amount of water to the leaf surface to keep the leaf surface clean.

There are many reasons why the leaves of sunflower can be yellowed and withered, and we need to eliminate them so that they can be treated with pertinence. In addition, leaf drooping is also a common phenomenon in the planting process of sunflower, which also needs to be paid more attention by growers.