The rhododendron leaves are yellowing. What's going on?

Rhododendron is a common flower variety, and it is also one of the top ten flowers in China. If there are problems in the breeding process, resulting in rhododendron leaves yellowing, it will seriously affect the ornamental value of rhododendrons, but for beginners, in the face of rhododendron yellow leaves will often become at a loss, randomly take some measures. So what on earth is the yellowing of rhododendron leaves? Next, the pro-agricultural network will introduce it to you.

I. the reasons for the yellowing of rhododendron leaves

First of all, let's take a look at the reasons for the yellowing of rhododendron leaves. Here, the pro-agricultural network summarizes four points, all of which are often ignored in our daily maintenance process. Let's take a look at them together.

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 ℃.

Second, how to prevent the yellow leaves of rhododendron

In fact, it is difficult to completely prevent the occurrence of yellow leaves in azaleas, but we can try our best to provide a suitable growth environment for azaleas to reduce the possibility of yellow leaves. In addition to the points mentioned above, the pro-agricultural network has two more points to tell you here: the first is to change the basin in time, once every two years, usually only need to change the soil, which can not only renew the nutrients in the soil, but also avoid excessive changes in the soil environment and affect the growth of plants. The second point is to prune diseased branches and weak branches in time, which can not only promote plant growth, but also ensure perfect plant shape and reasonable branch distribution.

These are the reasons and solutions for the yellowing of rhododendron leaves introduced by the pro-agricultural network. I hope I can bring you some help. Rhododendron has a peculiar shape, is an excellent bonsai material, but also a kind of traditional Chinese medicine with the effect of promoting blood circulation and relieving pain, as well as a certain economic value and edible value, is a multi-purpose flower plant.