Reasons for Yellowing Leaves on White Magnolia and Solutions

The white magnolia (Michelia alba) has high ornamental value, and yellowing leaves are a very common problem during cultivation, mainly caused by improper care. So if you want a white magnolia with elegant white flowers and verdant green branches, you need to put more effort into its care. Let's take a look at the reasons for yellowing leaves on white magnolia and the solutions!

Excessive Water Causing Yellowing Leaves

[Cause of Yellowing] When the white magnolia's potting soil is watered too much or too little, or alternates between dry and wet, its fleshy root system cannot tolerate it, which can cause yellow leaves.

[Solution] Watering should be appropriate. After the potting soil dries, do not water too much at one time, and do not leave it in a drought state without watering for a long time.

Excessively High Temperature Causing Yellowing Leaves

[Cause of Yellowing] Yellowing leaves on white magnolia are greatly related to temperature. When the temperature is too high and stuffy, yellow leaves can also appear.

[Solution] The temperature should be kept stable, neither too high nor too low, with 5-10°C being most suitable. When the temperature rises and the environment becomes stuffy, pay attention to ventilation and strengthen humidity management.

Insufficient Light Causing Yellowing Leaves

[Cause of Yellowing] White magnolia loves sunlight. If there is too little sunlight, it can also cause poor plant growth and yellowing leaves.

[Solution] White magnolia is suitable for planting in courtyards, home balconies, windowsills and other places. It needs sufficient sunlight, but cannot be exposed to harsh sun. In summer, when the sunlight is intense, pay attention to shading.

Chlorosis Causing Yellowing Leaves

[Cause of Yellowing] When white magnolia develops chlorosis, it can also cause leaves to yellow and drop, and in severe cases, the plant may die.

[Solution] The potting soil for white magnolia should be slightly acidic soil, and you should not apply too much alkaline inorganic fertilizer or water. If chlorosis occurs, promptly spray the leaves with 0.2% ferrous sulfate, once a week for 3-4 consecutive times, or spray with alum fertilizer water once a week for 3-4 consecutive times to control the condition.

Root Rot Causing Yellowing Leaves

[Cause of Yellowing] When white magnolia develops root rot and the root system rots and turns black, the leaves will also become withered, yellow and drop.

[Solution] Root rot is mainly caused by excessive water. Normally, wait until the surface of the potting soil turns white before watering, and loosen the soil regularly. During the plum rain season or when there is too much rain, it is advisable to move it under the eaves or indoors to shelter from the rain; when potting, add more broken tiles etc. at the bottom of the pot to ensure smooth drainage, and prop the pot up on bricks to speed up water flow.