Green in the summer and red in the fall.

All leaves contain green chlorophyll, which trees use to capture light energy and store it as chemicals such as sugar with the help of other substances in the leaf. In addition to chlorophyll, many leaves contain other pigments such as carotenoids, yellow pigments, and red pigments.

While these pigments can't photosynthesize like chlorophyll, some of them are able to transfer captured light energy to chlorophyll. In the spring and summer, chlorophyll is much more abundant in the leaves than the other pigments, so the leaves take on the green color of chlorophyll, and you can't see the color of the other pigments.

When fall arrives, the days shorten and the nights lengthen, which causes trees to begin dropping their leaves. Before dropping their leaves, trees no longer make as much chlorophyll as they did in spring and summer, and existing pigments, such as chlorophyll, break down. Thus, as the amount of chlorophyll gradually decreases, the colors of the other pigments gradually show up on the leaf surface, and the leaves take on a yellow or reddish color.

Expanded Information:

Maple Leafs: The Maple Leaf is the most important plant in the world. p>Maple breeding notes

1, watering

Watering the maple tree, in the growing season is generally to be watered regularly, in the higher temperatures also need to sprinkle the ground often to keep wet. During the winter months, be careful to water sparingly.

2, fertilization

Maple bonsai fertilization generally do not need to be too diligent, in addition to the winter does not need to fertilize, the other seasons generally fertilize once or twice on the line.

Baidu Encyclopedia - Maple