1. Improper watering
When watering banyan trees, we must adhere to the principle of not watering them, but watering them thoroughly. Drying here means that the surface of the basin soil is dry, not that the basin soil is completely dry. Of course, even the drought of Toya will not cause great harm to the banyan tree in a short time, because the leaves of banyan tree are thick and small, which has certain drought tolerance.
2. Improper fertilization
Fertilization of banyan requires thin fertilizer and diligent application. Avoid applying high-concentration chemical fertilizer or organic fertilizer that has not been fermented and decomposed, otherwise it will cause fertilizer damage, light leaves will fall off, and heavy ones will die.
3. Insufficient light
Banyan trees grow well in a well-lit environment. If it can be shaded by 30-50% at high temperature in summer, its leaves will be greener, but it is best not to shade when the temperature is lower than 32℃ to avoid the leaves falling off.
All the leaves have fallen off because of insect pests.
What about banyan bonsai's defoliation?
1. First of all, water should be appropriate. Water depends on whether the topsoil is dry or not. If it is dry, water it thoroughly. Watering is very particular. Too much watering or lack of water will lead to the loss of leaves.
2. Fertilization should be thin and diligent, and a small amount should be applied at first, so as to keep green. Because too much fertilizer will turn yellow Lack of fertilizer can also cause leaves to turn yellow. In addition, don't use high-concentration chemical fertilizers, which will lead to overnutrition, defoliation or death.
3. It is best to place banyan bonsai in a place with sufficient light. The more light there is, the more vigorous it will grow. But if it is in hot summer, you can shade yourself properly to avoid sunburn. Usually, if there is less light, you should get more sun.
4. Pay attention to insect prevention at ordinary times. Common hazards include red spiders and scale insects, so if these pests are found, they should be sprayed in time to eliminate them.
If the defoliation is serious, besides pests, it depends on whether the roots are damaged. If they are injured, don't fertilize them for four weeks. Water the leaves properly and keep enough water, but not too much. After four weeks, some nutrient solution can be properly applied.
6. Pay attention to loosening the soil and ventilation, and keep an appropriate temperature, which is generally 10 to 30 degrees Celsius.
In short, it is necessary to properly water, fertilize, control pests and diseases, pay attention to loosening soil and ventilation, and maintain sufficient sunshine and appropriate temperature.