The concept of "seasonal stage"

Seasons: the appearance of plants in different seasons. During the growth of plants all year round, the shapes and colors of leaves, flowers and fruits change with the seasons. When flowering, fruiting or leaf color changes, it has high ornamental value. Garden plants should make full use of their seasonal characteristics.

In different climatic zones, the time of plant season is different. Spring in Beijing is later than Hangzhou, and autumn is earlier than Hangzhou. Even in the same area, whether the climate is normal or not often affects the time and color of the season. Low temperature and drought will delay the germination and flowering of vegetation; Red leaves generally need a large temperature difference between day and night to turn red. If the frost period is too early, the leaves will not turn red and fall first, and beautiful autumn colors will not be produced. Factors such as soil, protection and management can also affect seasonal changes, so seasonal changes can be controlled manually. In order to meet the needs of the exhibition, potted plants can even be specially treated to delay the flowering period or make plants with different flowering periods bloom at the same time.

The application of plant seasons with high ornamental value and distinctive characteristics in garden plants can give people seasonal inspiration, enhance the sense of seasons and show the unique artistic effect of plants in garden landscape. For example, mountain flowers are blooming in spring, lotus flowers reflect the sun in summer, fruits are everywhere in autumn, and wintersweet is fragrant in winter. As far as the overall landscape of a region or a park is concerned, the garden is required to have four seasons scenery; Some scenic spots often highlight the characteristics of one or two seasons, and there are many ways to plant single plants or several plants in groups. For example, the peach willows in Su Causeway are spring scenery, the wind and lotus of Qu Yuan are summer scenery, the osmanthus flowers in Manjuelong are autumn scenery, and the snow in Gushan is winter scenery. In order to avoid the phenomenon of local drought in the period when the seasonal phase is not obvious, the ornamental period can be prolonged by mixing trees with different flowering periods and adding evergreen trees and herbal flowers. For example, in Wuxi Meiyuan, osmanthus fragrans are planted among plum blossoms, and they are watched in spring and enjoyed in autumn. In winter, you can also see Ye Changqing in Guangxi. In the Peony Garden in Huagang, Hangzhou, the fish are mainly peonies, as well as red maple, boxwood, crape myrtle and pine trees. Peony flowers still maintain a good landscape effect after withering.