What does it mean that the apple tree at home blooms in September?

Deciduous fruit trees such as pears, peaches, dates, kiwis and apples should all be "spring flowers and autumn fruits", which begin to sprout in spring, bud, blossom, bear fruit and mature one after another, and enter dormancy after defoliation in late autumn. However, when one of the links is disrupted, it will cause the growth and development rhythm of fruit trees to be chaotic. In some years or autumn, under the restriction of special natural conditions such as soil, moisture and climate, fruit trees suffer from explosive pests and diseases, which lead to early defoliation or leaves being eaten up by pests, while light and temperature are still suitable for fruit tree growth. At this time, the mature dead buds and leaf buds of fruit trees germinate, and the abnormal phenomenon of flowering again in a year occurs, mostly in autumn, so it is also called "secondary flowering in autumn" and "autumn flower".