The nature and function of garden green space determine the choice and planting form of plants. There are many functions of garden green space, but when it comes to a certain green space, it always has its specific main functions. For example, the main functions of street green space are shading and organizing traffic. Therefore, planting focuses on solving the problems of shading, traffic and beauty (large crown of street trees, hedgerow isolation and ornamental effect).

2. Meet the needs of landscape composition.

1) The overall artistic layout should be coordinated.

Conventional garden layout, mostly in the form of conventional configuration, for planting, planting, central planting, flower beds, whole flower beds, plant shaping and pruning. In the natural garden green space, asymmetric natural planting is adopted to fully show the natural posture of plants, such as single planting, cluster planting, group planting, woodland, flower cluster, flower border, flower belt and so on.

2) Consider the comprehensive ornamental effect.

There are many requirements for people to appreciate plant scenery, but there are few or no all-round garden plants. Therefore, plants should be reasonably matched according to their ornamental characteristics, so as to reflect the comprehensive effects of plants in terms of shape, color and sound. The specific configuration method is as follows:

Combination of flowering and foliage plants

A combination of trees and shrubs of different colors

Plant combinations at different flowering stages

Herbaceous flowers make up for the shortage of woody flowers and trees.

3) The scenery of the four seasons has changed.

Organize the seasonal composition of the garden. Make the color, fragrance, posture and rhyme of plants appear alternately with the changes of seasons to avoid monotonous scenery. Key areas must have scenery at four o'clock, and other areas can highlight the scenery in a certain season.

4) The proportion of plants should be appropriate.

The configuration of different plant proportions affects the changes of plant landscape level, color, seasonal phase, space and landscape morphology and the stability of plant landscape. Therefore, fast-growing trees and long-lived trees should be selected in tree configuration; Trees and shrubs; The proportion of branches and leaves to flowers, trees, flowers, lawns and ground cover plants is appropriate.

In the design of plant planting, the appropriate proportion of trees and flowers should be determined according to different uses and specific conditions. For example, the proportion of evergreen trees and conifers in memorial gardens can be larger; There will be more flowers and trees in the yard.

5) Design from the big picture.

The whole should be planted before the individual. First of all, we should consider the plane outline, elevation fluctuation, landscape line arrangement, landscape level, color block size, main color, planting density and so on. Secondly, according to the requirements of height, size and color, the specific plant species of arbor, shrub and grass are determined, and the appreciation requirements of tree type, flower, fruit, leaf and texture of a single plant are considered at close range. Don't decide on a specific category at the beginning.