In what season do maple leaves fall?

1. Maple leaves fall in autumn. When autumn comes, the days get shorter, the nights get longer, the weather gets colder, the soil temperature decreases, the rainfall decreases, and the water absorption capacity of roots is greatly weakened, but the transpiration intensity is not weakened, resulting in water shortage and defoliation. At the same time, after a certain period of physiological activities, a large number of metabolites such as minerals accumulate in cells, causing physiological function decline and death (chlorophyll destruction).

Maple leaves turn red in autumn. Maple leaves in autumn, because the temperature drops, the green pigment of maple leaves turns red. In northern China, autumn comes from August to 10, and the real autumn usually comes after September, so the maple leaves generally don't turn red until September 10. In the south of China, when it is cold later, the maple leaves will turn red later.