The anniversary of the perennial flower grows in the open field. The characteristics of one year of planting and many years of viewing save a lot of manpower, material resources and financial resources, but at the same time it seems to lose the timeliness and flexibility of the greening and beautification of grass and flowers for one or two years. Modern garden plant landscaping is a perfect combination of science and art. It is a realm of "teaching nature" and "above nature". Therefore, in the process of greening and beautifying the use of perennial flowers, we should give full play to the advantages of rich variety and different ecology, and rationally allocate them to create beautiful scenery with distinct seasons and colorful colors. Specifically, the following principles must be followed.

First, we must follow the ecological characteristics of Perennial flowers.

Because of its anniversary growing in the open field, the perennial flower is not as refined as the greenhouse flower, so it has certain requirements and adaptability to the surrounding ecological factors. It is necessary to select the corresponding conditions according to different light, moisture, temperature and soil conditions. Perennial flowers, try to be suitable for flowers. For example, under the forest, on the back of the building, etc., where the scattered light is dominant, the negative-resistance perennial flower should be selected. While the suitable flower is suitable, the relationship between the species and the species of the perennial flower should be handled well. Planting the same kind of flowers together, we must arrange the planting method and density, distance to meet their own ecological requirements. Planting between different types should be as consistent as possible. Only in this way, the perennial flower can grow normally and maintain relative stability, so that the viewing effect can not be changed for years.

Second, it must be in harmony with the surrounding environment and conform to the function.

Different greening environments have different functions and requirements, so the planting design of perennial flowers is different. For example, street green space, the main function is to shade and beautify the environment. Without prejudice to the traffic sight, the combination of various flower shrubs and perennial flowers can enrich the streetscape and bring a feeling of sympathy to the pedestrians. Another example is the residential area and the street heart park. Its function is to beautify the environment and provide a beautiful resting place for the masses. In this area, it is generally based on the cultivation of perennial flowers, which are suitably equipped with exquisite flower shrubs, pruning-shaped plants, and tree-like small trees to create a small streetscape. On both sides of the street, you can choose some perennial flowers with strong resistance and compact plant shape, such as green onion, lycopene, safflower sorrel, along the grass, etc., also have the characteristics of wide viewing line and strong decorative effect.

Third, we must rationally configure to make the landscape viewing effect as continuous and complete as possible.

Perennial flowers are planted in one year and watched for many years. In order to avoid the falliness of the leaves in autumn and winter, and the rest of the flowers in the hot summer, the adverse effects brought by the bare ground should be reasonably arranged on the basis of a full understanding of the ecological habits of various perennial flowers, so that the perennial flowers are one year. The viewing effect of the four seasons maintains continuity and integrity. For example, the poached peony and the columbine grow only in the first half of the summer in hot regions. When the hot summer arrives, they will wither due to dormancy. This requires the summer and autumn to grow vigorously between the plants and the spring to the early summer without affecting their growth. Other flowers with ornamentals. The root system of Lycoris is very deep, and it stays green in autumn and winter. It has no leaves when it blooms. If it is planted with the green and green stalks of the stems and leaves, or the sedges grown with the shallow roots, it will receive good results. The viewing effect. Another example is that the blue flowers in early spring and the purple jasmine, which is rich in color and slightly fragrant in early autumn, are just mixed with each other, and they are staggered by their respective leaf-leafing and flowering periods, which solves the problem that the loess under the trees is not seen.

Fourth, we must pay attention to the changes and contrasts of the seasons and colors.

There are many kinds of perennial flowers, and the flowering period is early and late. The colors are also extremely rich. If you mix well in the planting design, pay attention to the changes in the seasons, and take into account the color and flower posture of each other in the same season, and the coordination and contrast with the surrounding colors, it will form three seasons of flowers, evergreen, and colorful. Beautiful and beautiful scenery.

To achieve seasonal and color changes and contrasts, it is necessary to be familiar with the flowering, flower and flower patterns of various perennial flowers. Such as early spring, the blue flowers, tulips, hyacinths, calendula, iron chopsticks, snow drops, etc.; summer flowering canna, large flower purslane, big flower sedge, perennial phlox, hollyhock, goldenrod , jade, purple, green onion, etc.; early flowering early chrysanthemum, Japanese early chrysanthemum, yarrow, daisy, chrysanthemum, etc.; winter flowering narcissus, yellow flower and garlic. In terms of color coordination, it is necessary to coordinate with the surrounding environment, and it must have a theme, a characteristic, a mood, and an aesthetic. For example, if it is planted at the water's edge, light flowers such as beige and yellow, such as aquatic iris and jade grass, should be used. Planting on the mountain side should choose colors similar to mountains and rocks, such as Tu Sanqi, Sedum, and Dutch chrysanthemum. Warm colors such as red, yellow, and orange should be used in the trees. In addition, the color should be designed according to the climate, the season, the function of the garden green space, etc. Generally, the cold color is used in the hot summer season, and the warm color is used in the cold winter.

The five plant configuration materials have main, subordinate, leaf color, texture, and plant type.

When planting design, the perennial flower has its own main tone and tone, whether it is flower belt, flower bed or flower. The number of keynotes is large and significant, and the number of keynotes is small and the proportion is small, reflecting the key points and the relationship between the master and the slave. In addition, between the main plant materials and the main plant materials, the leaf color, texture and plant type should also be matched and coordinated. For example, in the planting design of the flower belt in the residential area, the main focus of the sedge, the appendix and the early gerbera are not only the seasonal changes, but also the plant type, leaf color and texture. The leaves of the appendix are vertically upward, and the leaves of the yarrow and early chrysanthemum extend laterally; the leaves of the appendix are sword-shaped, while the leaves of the sedge are lanceolate, and the leaves are white-green and dark green.

The perennial flower planting design as a group viewing effect has been very common in foreign countries, and has achieved good greening and beautification effects. But in China, it has just started. It reflects the modern concept of advocating nature and pursuing nature. As the basis of perennial flower application, China's perennial flower variety resources are very rich. As long as we dare to explore and dare to innovate, we believe that we will continue to create beautiful human worlds.

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