What if the dahlia leaves turn yellow / pay attention to 5 points to easily solve / control the light

Dahlia is a highly ornamental plant with a very gorgeous outside. Because of this, if there is a little flaw will affect its overall beauty, such as yellowing leaves, it will look very abrupt, about the dahlia leaves yellowing what to do? Next, the editor will take you to learn about it.

What if the dahlia leaves turn yellow / control the light

1. Soil problem

If you do not choose the right soil when planting dahlia, such as choosing a very sticky soil, it will cause the leaves of dahlia to turn yellow and have a great impact on its growth. If it is for this reason, we need to change the soil in time, we can choose better drainage humus soil, which is more conducive to the growth of dahlia.

two。 Control the amount of fertilizer application

Fertilizer is one of the main nutrients in the growth process of Dahlia, but the amount of fertilizer application still needs to be controlled. Too often or too little fertilizer may lead to the yellowing of dahlia leaves. It can be fertilized once every 15-20 days during the growing period.

3. Watering the right amount

The reason for the yellowing of dahlia leaves is also improper watering. Dahlias are not resistant to waterlogging or drought, so we must master a certain degree when watering, and we must maintain the principle of dry watering when watering, so that this problem will not occur.

4. Illumination control

Dahlia is a kind of light-loving plant, spring and autumn are more suitable for its growth season, in these two seasons can be kept outdoors for a long time for breeding. When the summer sun is too strong, you need to move to the indoor semi-shade for breeding. If you are exposed to the sun outdoors, it is easy to cause the leaves to turn yellow.

5. Pest control

The occurrence of diseases and insect pests is also one of the reasons for the yellowing of dahlia leaves, if this phenomenon occurs, it needs timely prevention and control. In the article on the prevention and control of diseases and insect pests of Dahlia, there are prevention and control methods for all kinds of diseases and insect pests, you can refer to them, but there is no more introduction in this editor.

What if the dahlia leaves turn yellow?

Dahlia, nicknamed Dahlia, Tianzhu Dan and Dahlia, has more than 30,000 varieties, making it one of the largest species of flowers in the world. Colorful dahlias symbolize generosity, richness and good fortune, so they become frequent visitors in the garden and are world-famous ornamental flowers. However, when cultivating dahlias, the leaves of dahlias often turn yellow and affect their flowering because of improper cultivation. What if the dahlia leaves turn yellow? The editor will give you some advice.

The habit of Dahlia

To prevent the yellowing of dahlia leaves, let's first analyze the habits of dahlias. Dahlia like semi-shade, the sun is too strong to affect flowering, the light time is generally 10-12 hours, when cultivating seedlings to avoid direct sunlight. Dahlias like cool climate, blooming in late September is the largest, most gorgeous, the most prosperous, but not resistant to frost, stems and leaves immediately withered after frost. During the growing period, the temperature is not strict, 8-35 ℃ can grow, 15-25 ℃ is suitable. Dahlias are not resistant to drought and waterlogging. In general, potted plants can be watered when the soil is dry, so that they can be seen wet and dry; on rainy days, they can be poured into pots for drainage (ground cultivation does not have to be watered frequently). Dahlia is suitable for cultivation in fertile sandy soil with loose soil and good drainage.

The reason for the yellowing of dahlia leaves

Dahlia leaves will wither, most likely: ① is mostly because the cultivated land is too low wow stagnant water, met for several days of Rain Water will be caused by waterlogging and rotting roots. ② may also be caused by improper fertilization and direct application of chemical fertilizer to the main root by burning the root (or irrigating water-free urine fertilizer).

What if the dahlia leaves turn yellow?

1. Selection of potted soil. Dahlia is suitable for cultivation in loose, humus-rich sandy loam or artificially prepared nutrient soil. It is found that the leaves of dahlias turn yellow and check the soil and replace them in time.

2. Light and temperature. Dahlia like light, the whole growth period need sufficient sunshine, and should not be too strong, seedling stage to avoid direct sunlight. Dahlia is neither cold-resistant nor cool-shy, and the most suitable temperature for growth is 10-30 ℃. Observe the growing environment of dahlias to see if the climate affects their growth.

3. Water and fertilizer management. Dahlia is a fleshy, fat root, which is neither resistant to drought nor afraid of waterlogging. Watering should grasp the principle of "dry and thoroughly irrigated". The stagnant water in the basin should be removed in time during the rainstorm. Dahlia like fertilizer, when applying base fertilizer, be careful not to come into contact with root tubers to prevent burns.

4. Disease control. The main diseases of Dahlia are powdery mildew and leaf spot, so ventilation and drug control should be strengthened.

This is the end of the prevention and control measures for the yellowing of dahlia leaves. When cultivating dahlias, we should pay attention to loose soil, sufficient sunshine, good drainage, at the same time, strengthen ventilation, pay attention to the essentials of fertilization, and avoid burning plant roots.

How to prevent dahlia leaves from yellowing and falling

Pay attention to the selection of basin soil

Dahlia is suitable for cultivation in loose, humus-rich sandy loam or artificially prepared nutrient soil.

Appropriate light and temperature

Dahlia like light, the whole growth period need sufficient sunshine, and should not be too strong, seedling stage to avoid direct sunlight. Dahlia is not cold-resistant and afraid of extreme heat, and the most suitable growth temperature is 10 ℃ ~ 30 ℃.

Strengthen the management of water and fertilizer

Dahlia is a fleshy, fat root, which is neither resistant to drought nor afraid of waterlogging. Watering should grasp the principle of "dry and thoroughly irrigated", and the stagnant water in the basin should be eliminated in time during rainstorm. Dahlia like fertilizer, when applying base fertilizer, be careful not to come into contact with root tubers to prevent burns.

Strengthen disease prevention and control

The main diseases of Dahlia are powdery mildew and leaf spot, so ventilation and drug control should be strengthened.