Causes and treatments of yellow magnolia leaves

1. Excessive watering

1. Reason: Excessive watering may cause its leaves to turn yellow. Watering too frequently will cause water accumulation at the roots, root erosion, and reduced ability to absorb water. This eventually leads to severe water shortage and the leaves wither and turn yellow.

2. Treatment method: At this time, you should immediately stop watering, then cut off the yellow leaves and rotten roots, and transplant it to new and cool soil and maintain it carefully. Pay attention to controlling the amount and frequency of watering in the future.

2. Improper fertilization

1. Reason: Applying too much fertilizer or applying fertilizer at an inappropriate time may cause the soil to become compacted and cause root burn, which will affect its absorption of nutrients. Applying too little fertilizer will result in the plant being unable to absorb the nutrients needed for growth and normal metabolism, causing the plant to grow poorly, sluggishly, and turn yellow.

2. Treatment method: It needs to be removed from the original soil and transplanted into new, loose and breathable culture soil. The fertilizer should be thin and dilute, and more compound fertilizers containing nitrogen, phosphorus and potassium should be applied. At the same time, the frequency of fertilization should not be too low. The recommended frequency is about once a month during the growing period, and it can be adjusted according to specific circumstances.

3. Diseases, Pests and Insects

1. Reason: When it is attacked by fungi and causes common magnolia diseases such as leaf spot, it is easy for part of the leaf surface to necrotize. When infected by the virus, yellow mosaic spots will appear on the surface of the leaves. When attacked by pests and diseases such as red spider mites and whiteflies, the leaves will wilt, turn yellow, and eventually fall off.

2. Treatment method: At this time, insecticide or fungicide should be used for spraying and treatment in time.