Why do camphor trees lose their leaves in spring?

It is normal for Cinnamomum camphora to shed leaves in spring.

Reason:

Although camphor tree belongs to evergreen tree species, it likes warm and humid climate and does not shed leaves in winter. It is used as a street tree in many cities. But its leaves also have a life span. In spring, the temperature gets warmer, the metabolism of Cinnamomum camphora accelerates, and the leaves enter the process of changing leaves. When the old leaves fall, a large number of new green leaves are constantly being pulled out. The process of changing leaves of Cinnamomum camphora in Hunan is relatively slow, generally about one month. During this period, the leaves that have not fallen will look a little yellow, which is normal.