Causes and Solutions for Yellowing Leaves on Chinese Evergreen
Chinese evergreen (Aglaonema) gets its name because its leaves stay green all year round, but some friends find that the leaves of their Chinese evergreen turn yellow when they grow it. What is going on here? Let's take a look together.
1. Excessive temperature and light
Too high a temperature or too strong light will both cause Chinese evergreen to struggle. Chinese evergreen is native to tropical regions and likes a hot, humid environment, with an optimum growing temperature of 20-28 degrees. In summer, once the temperature exceeds 30 degrees, its normal growth will be affected. If the temperature rises even higher, it will cause yellow leaves and may even cause leaf drop. In addition, in northern regions, stronger light combined with dry air can also very easily cause scorched yellow leaf edges, so in summer pay attention to changes in the ambient temperature. It can be placed indoors to avoid direct strong light.
2. Insufficient water
Chinese evergreen likes a hot, humid environment and is relatively tolerant of moisture. In summer, with high temperatures, the plant and soil evaporate a lot of water. If it cannot be watered, or if it has not been watered thoroughly for a long time, it will cause yellow leaves and may even cause leaf drop. Therefore, water management must be done properly. Grasp the principle of “do not water when dry, and water thoroughly when watering”, water in combination with loosening the soil, and at the same time frequently spray water mist on the leaves to increase air humidity.
3. Improper fertilisation
Too much fertiliser or fertiliser that is too concentrated will also seriously affect the growth and development of Chinese evergreen, causing only a small amount of growth. It only needs 1-2 applications of phosphorus and potassium fertiliser each month during the vigorous growth periods in spring and autumn. During the low-temperature period in winter and the high-temperature period in summer, its growth basically stops, so fertilisation should be stopped immediately to prevent the fertiliser from being unable to be absorbed by the roots, which would cause root rot.
4. Pests and diseases
Leaf spot disease caused by infection with fungi and other pathogens will also cause local necrosis of the leaves, producing yellow spots or patches, and in severe cases causing the whole plant to wither, yellow and drop leaves; when attacked by mosaic disease, the leaves will also show mottled patches of alternating yellow and green; when attacked by pests such as scale insects and red spider mites, local yellow leaves will also appear. In addition, when preventing and controlling pests and diseases, be sure to pay attention to the concentration of the medicine, so as to avoid too high a concentration causing phytotoxicity, which can also lead to yellowing and leaf drop.
The above is an introduction to the causes of yellowing leaves on Chinese evergreen and the solutions. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.