1、 Supplement nutrients

If you don't get enough nutrients for a long time, the plant will develop poorly, resulting in the phenomenon of yellow leaves. It is necessary to supplement fertilizer for plants. Generally, nitrogen fertilizer is used more. This kind of fertilizer is very helpful for the growth of leaves. But also pay attention to the concentration of fertilizer, otherwise it will lead to plant overgrowth

2、 Enhanced illumination

The umbrella cannot grow in a dark place, otherwise it will not be able to carry out photosynthesis and synthesize nutrients because it cannot get enough light, resulting in the phenomenon of yellow leaves. In this case, it needs to be moved to the sunny place in time so that it can fully see the light, but also avoid being exposed to the sun

3、 Watering acidification

If the soil is alkaline, or often watered with alkaline water, it will also lead to yellowing of plants and yellowing of leaves. In this case, it is necessary to add an appropriate amount of ferrous sulfate when watering, which can play the effect of acidification, or apply a little alum fertilizer to it, which can also effectively improve the acidity and alkalinity of the soil

4、 Proper cooling

Big leaf umbrella is afraid of strong light and high temperature. If it is exposed to the sun for a long time, it will also cause the leaves to turn yellow. Usually put the plant in the semi shade, spray water around it, and cool it by evaporation. In addition, good ventilation should be maintained to avoid breeding bacteria and causing various diseases and insect pests in the environment of high temperature and humidity