Leaves contain a lot of chlorophyll, so the color is green. In autumn, the weather gets cold, the growth rate of trees slows down, and the chlorophyll in leaves is gradually decreasing. Finally, only lutein is left, and the leaves turn yellow. Maple leaf contains a special substance-anthocyanin, which is just the opposite of chlorophyll. As the weather turns cold, the number gradually increases, making the maple leaves turn red.
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Maple trees like a cool environment and avoid strong direct sunlight. Therefore, bonsai should be maintained under shade shed or other trees. If placed under strong light or on the balcony, scorched leaves often appear. Due to poor indoor ventilation, maple bonsai should not be placed indoors for more than a week, otherwise it is not conducive to growth. In winter in the north, maple bonsai will be moved into a low-temperature room. In the south, you can spend the winter safely as long as you bury the basin in the soil in the lee and the sun.
Water it. Maple leaves are big and water evaporates quickly. Water the ground frequently during the growing period, and sprinkle it frequently when the weather is hot to keep the microclimate moist. In winter, when maple trees enter dormancy, they should be watered less, as long as the soil in the basin is wet.
Fertilize. In spring, the rare organic liquid fertilizer should be applied once before the maple tree germinates and when the leaves are displayed, but it should not be applied in rainy days. From August to September, the decomposed dilute liquid fertilizer should be applied once each. Don't fertilize during winter dormancy.