What causes the leaves of banana shrub (Michelia figo) to turn yellow?
Banana shrub (Michelia figo) is a traditional famous flower in China, with a long history of cultivation in the country. It is highly valued for its delicate beauty and its excellent ornamental value, and it is also relatively strong in other respects, with high medicinal value. However, during pot cultivation, the phenomenon of yellowing leaves occurs. What causes this? Let's find out together.
1. Unsuitable soil
If the leaves of the banana shrub suddenly turn yellow, it may be caused by unsuitable soil. Unsuitable soil prevents the roots of the banana shrub from growing normally, root absorption is blocked, and the leaves turn yellow due to a lack of nutrients and water. It is recommended to replace the soil with new soil in time, or ferrous sulfate can be used to improve the acidity of the soil, and the soil should be loosened appropriately to help it recover more vitality.
2. Overwatering
The banana shrub has strong drought tolerance and usually does not need to be watered promptly. If it is watered too much, the roots soak in standing water, the roots suffocate and rot, which causes its leaves to turn yellow. Therefore, the amount of watering must be controlled. It is not advisable to water too much at one time, especially during the winter dormant period, when the amount of water given to the banana shrub must be well controlled. Also cut off the rotted roots and prepare new soil for it.
3. Excessive fertilization
The banana shrub does not have a high demand for nutrients. If a large amount of fertilizer is applied during cultivation, it will also cause its leaves to turn yellow, and in severe cases cause the roots to rot and turn black and the plant to die. Therefore, fertilization should be controlled during cultivation. Apart from appropriate fertilization during vigorous growth, there is no need to fertilize at other times. If too much fertilizer is applied, pour a large amount of water into the soil in time to dilute the fertilizer concentration, or change the pot and soil and replant.
4. Seasonal temperature differences
In autumn and winter, under conditions with large temperature differences, the leaves of the banana shrub are also very likely to turn yellow, and it may even cause the banana shrub to die. Usually, during the day it should be placed in a ventilated environment with sufficient light for cultivation, while at night the temperature should be controlled, keeping the temperature above 10 degrees to minimize the effect of temperature differences on it.
The above is an introduction to what causes the leaves of banana shrub to turn yellow. We hope it can help you. To learn more related knowledge, please follow us.