Why do different types of plants not change color of foliage at the same time? Give examples

Some trees change the color of their leaves much earlier or later than other types of plants. The color of the foliage of each species is also different. The color changes due to the fact that the plant, before hibernation, throws out all unnecessary substances into the leaves. They are often toxic and harmful to the tree. Therefore, they simply remove them by dropping the leaves. Because of this, leaves cannot be burned, since due to harmful substances we poison not only the world around us, but also ourselves. Apple tree, birch, maple, oak – change the color of the foliage and shed them at different times.