When do the autumn leaves bloom What season is the autumn leaves red?

At the end of October, at the beginning of November.

Momiji plum. It is a masculine plant and prefers a sunny environment with abundant water and soil. In a semi-shady environment, the land where the red leaf plum is planted should be avoided from buildings and trees.

It should be used in urban green space and gardens, and should be planted alone or in clusters in a corner of the lawn, on the side of mountains and rocks, in front of evergreen trees or in a single mixed plant among other trees and at the edge of evergreen trees. It is suitable for planting forests in urban parks and mountain scenic spots in landscaping, and can also be mixed with other red or yellow leaf tree species to form forests. Red leaves to sulfur dioxide.

It is highly resistant.

Autumn Foliage Tourism Festival. The autumn leaves here are home to four "national homes". The largest:

It stretches for more than 100 miles; The most varieties: more than 10 species of red-leaved trees; The colors are the most charming: Affected by the unique climate of Changbai Mountain and Songhua Lake, the colors are bright and bright, and the red leaves are full of colorful colors; Autumn leaves are the most precious

The red leaves of Jiaohe River are only "short-lived" from September 20 to October 10 every year.

The autumn foliage festival usually lasts for one month from mid-to-late September to mid-to-late October.

The autumn leaves are red in autumn, probably between September and October. The specific depends on the region, and the temperature is different in different regions, so the time for the maple leaves to turn red is different. If it is in the warm region of the south, the time when the maple leaves turn red will be delayed, possibly until October.

The overall ornamental value of the maple leaves is relatively high after they turn red, but they usually do not last long, and the leaves fall off soon after turning red.

Cause of reddening. The degree to which maple leaves turn red is related to factors such as time, drought, pollution, and especially the lack of nitrogen. The reddening of maple leaves is actually the result of the maple tree's response to stress in nature. The reddening reaction actually acts as a sunscreen, allowing the maple leaves to stay on the tree longer, allowing the tree to absorb more nutrients.

The study found that the stress of nutrients, especially the stress of nitrogen deficiency, made the maple leaves red earlier and more transparently.

Maple leaves are red in autumn because maple leaves only turn red in autumn. Because the temperature drops in autumn, the maple leaf green of the maple tree gradually turns red. Autumn in the north is from August to October, but the actual autumn does not begin until the end of September, so the autumn leaves do not turn red until September or October.

Specific reasons for turning red:

1. All leaves contain green chlorophyll, which is used by trees to capture light energy and store it in the form of chemicals such as sugar with the help of other substances in the leaves. In addition to chlorophyll, many leaves also contain carotene, yellow pigment, red pigment and other pigments.

2. Although these pigments cannot photosynthesize like chlorophyll, some of them can transfer the captured light energy to chlorophyll. In spring and summer, chlorophyll is much more abundant in the leaves than other pigments, so the leaves show the green color of chlorophyll, and the color of the other pigments is not visible.

3. When autumn comes, the days are shortened and the nights are lengthened, which causes the trees to begin to shed their leaves. Before the leaves fall, trees no longer produce as much chlorophyll as they do in spring and summer, and existing pigments, such as chlorophyll, gradually break down. In this way, as the chlorophyll content gradually decreases, the colors of other pigments will gradually appear on the leaf surface, so that the leaves will show yellow, red and other colors.

Autumn leaves bloom in autumn. Autumn leaves bloom from October to November every year, and there is no specific time, depending on the local climate, and the time of red is basically the same every year, but it is not fixed. After reddening, it is very beautiful, ornamental, ornamental trees, mainly looking at the leaves, favored by the literati of the past dynasties, and was first seen in Sima Xiangru's "Shanglin Fu".

Red leaf species: 1. Red leaves of torch tree: the family name is sumacaceae, which is a small deciduous tree of the family Sumaceae. Odd pinnate compound leaves alternate, oblong to lanceolate. The erect panicles are apical and the fruit spikes are bright red. The fruit is oblate and spherical, with red prickly hairs, which are tightly clustered to form a torch-shaped.

2. Cogscarus red leaves: alias red leaves, red leaves coggy, cogmomasia, cogmomas, cogs, etc., is an important ornamental red leaf tree species in China, the leaves turn red in autumn, bright and eye-catching, the famous Beijing Xiangshan red leaves are the tree species.

3. Maple red leaves: maple trees are tall trees, with a height of 24 meters and a crown width of up to 16 meters. It blooms from April to May and bears fruit from September to October. As the tree ages, the crown gradually opens up and becomes round.