Causes of yellowing of evergreen leaves and its solutions

Evergreen is named evergreen because its leaves are evergreen all the year round, but some friends find evergreen leaves yellowing when they are farmed. How is this all the same? Let's get to know it with the editor.

1. The temperature and light are too strong

Too high temperature or too strong light will cause the maladjustment of evergreen. Evergreen is native to the tropics and likes high temperature and humid environment, and the suitable temperature for growth is between 20 and 28 degrees. Once the summer exceeds 30 degrees, it will affect the normal growth of maturity, if the temperature is higher, it will lead to the phenomenon of yellow leaves, and even leaf shedding. In addition, the strong light in the northern area, coupled with dry air, is also very easy to cause leaf edge scorched yellow, so in summer to pay attention to the temperature change of the environment, it can be placed indoors to avoid direct light.

2. Lack of water

Wannianqing likes the environment of high temperature and humidity, relatively resistant to water and humidity, high temperature in summer, large evaporation of plants and soil, if it can not be watered, or not watered through for a long time, it will cause yellow leaves, or even leaves fall off. Therefore, water management must be proper, grasp the principle of "no dry, no watering, watering thoroughly", combined with loose soil for watering, at the same time, we should often spray water mist on the leaves to increase air humidity.

3. Improper fertilization

Excessive or over-concentrated fertilization will seriously affect the growth and development of evergreen, resulting in small growth, so it is only necessary to apply phosphorus and potassium fertilizer 1-2 times a month during the peak growth period in spring and autumn. During the period of low temperature in winter and high temperature in summer, its growth basically stops, so fertilizer should be stopped immediately so that fertilizer can not be absorbed by roots and lead to root rot.

4. Diseases and insect pests

Leaf spot disease caused by fungi and other bacteria will also lead to local necrosis of leaves, yellow spots or patches, and in serious cases, the whole plant will wither and fall off; when damaged by mosaic disease, the leaves will also appear yellow-green mottled; local yellow leaves will also appear when damaged by scale insects, red spiders and other pests. In addition, in the prevention and control of diseases and insect pests, we must pay attention to the drug concentration, lest the drug concentration is too high to cause drug damage, these will also appear the phenomenon of yellow leaf shedding.

The above is the introduction of the causes and solutions of evergreen leaf yellowing. I hope it can help you. If you want to know more about it, please follow us.