The cause and treatment of the yellow leaves of Magnolia mandshurica

Purple magnolia is also known as magnolia, magnolia, etc., is a unique flower plant belonging to our country. It is widely distributed in the south of China, and its ornamental value is relatively high, and there is also a certain effect. Therefore, there are still many people planting purple magnolia, but when planting purple magnolia, the phenomenon of yellowing leaves often occurs. So what is the reason for the purple magnolia yellow leaves? What should I do? Let's take a look below!

1. Root growth is hindered

The root growth inhibition of Magnolia denudata L. is the main cause of yellow leaves. Purple Magnolia's waterlogging tolerance is very poor, if there is water in the soil, then it will seriously affect the growth of roots. This leads to insufficient nutrition and water absorption of Magnolia purpurea, and lack of nutrition in leaves, resulting in yellow leaves. Therefore, we should pay attention to controlling the water content in the soil. If accumulated water is produced, it should be discharged in time, and then the amount of watering should be reduced to restore it as soon as possible. Control the watering times and watering amount, watering about 4 times in the whole growth period of Magnolia grandiflora.

2. Poor drainage performance

Poor drainage performance is the main cause of soil ponding. In well-drained soil, ponding phenomenon is relatively small. On the contrary, if the drainage capacity is not good, it is easy to appear the illusion of water shortage in the soil, resulting in excessive watering, resulting in poor growth and yellow leaves. Therefore, if it is potted purple magnolia, then we must check the drainage and irrigation performance of the basin soil, if the drainage and irrigation is poor, then we must change the soil in time. The soil is mainly sandy soil, and the bottom of the flowerpot should also have drainage holes to improve the drainage capacity of the flowerpot.

3. Insufficient light

Light is very important to the growth of purple magnolia, purple magnolia likes to grow in an environment with sufficient light. If it is in a weak light environment for a long time, it will affect the photosynthesis of Magnolia denudata, resulting in the gradual chlorosis of leaves and the gradual appearance of yellow leaves. Therefore, we should pay attention to improving the light time and intensity when planting purple magnolia. To provide sufficient light for purple magnolia, must not let purple magnolia in the dark environment, affect the growth of purple magnolia.

4. Diseases and pests

Pests and diseases are also a major cause of yellow leaves in Magnolia. Diseases and insect pests can harm the leaves of Magnolia grandiflora, inhibit the growth of leaves, lead to insufficient absorption of nutrients, resulting in yellow leaves phenomenon, and serious diseases and insect pests can also lead to plant death. If there are diseases and insect pests, then check in time what specific diseases and insect pests are, prescribe the right medicine, and prevent the spread of the disease. And they must have a certain knowledge of pest protection and do a good job of prevention.

The above is a brief introduction to the causes and treatment methods of purple magnolia yellow leaves. Today's introduction is here, this article is for reference only, I hope to help everyone oh!