 apples now compared to about years of it when I moved in. Sure. Unfortunately, the average lifespan of an apple tree in our area is around 25 years, some more, some less. But they definitely have a lifespan. And at that point, there are things that start happening. Fire blight is a disease that we always hear about and that does go around. But the number one killer of apple trees in our area is a fungus called black rot.