According to geomantic omen, plants can be divided into two categories: bad luck and bad luck. There are two kinds of killers: one is a plant with poisonous gas and venom, which has certain scientific basis. For example, cordate telosma will emit a large number of particles that strongly stimulate the sense of smell at night, which has adverse effects on patients with heart disease and hypertension; The flowers and leaves of oleander are poisonous; Tulip flowers have soil alkali, which is easy to fall off when exposed to hair too much. And it is not suitable for garden planting. Second, discuss bad luck with the shape of a tree. Any tree that looks ugly, dignified and abnormally developed is considered bad luck. This is a psychological effect or a traditional humanistic aesthetic concept at work. As for auspicious tree, it is determined according to its characteristics, meaning and even homophonic, and people tend to hold this view in real life. For example, Feng Shui scholars believe that palm, citrus, bamboo, Toona sinensis, Sophora japonica, osmanthus fragrans, Ganoderma lucidum, Magnolia grandiflora, Ficus microcarpa, jujube, pomegranate, grape and begonia are all auspicious plants, while peach, willow, ginkgo, cypress, dogwood, soapberry and gourd are all auspicious plants.
Second, the planting orientation of garden tree species
Ancient geomantic classics have some conclusions about this: "Peach trees are planted in the east, plum dates are planted in the south, elm trees are planted in the west, and plum trees are planted in the north", "It is unlucky to hang willow in front of the door", "There is Sophora japonica in the middle of the door, and there is no ghost near the house", "Double dates are planted in front of the door, and bamboo and wood are all green in front of it to make money" From the above conclusions, combined with modern scientific knowledge, we believe that some conclusions contain natural scientific knowledge, while others have one. For example, the oriental planting in Tao Yang is reasonable because the sunrise is the first in the east, the willow sprouts earlier, and the peach blossom is one of the earliest plants in spring. Elm is a wet plant. When it is not afraid of the west, it is appropriate to plant it in the west. As for the locust tree to attract wealth and the elm tree to exorcise ghosts, there are elements of folklore. Willow should not be planted in front of the main gate, which means that willow is "easy to be virtuous" and psychologically unacceptable.
Third, the number of trees planted in the courtyard.
Feng Shui advocates reasonable close planting. It thinks: when the surroundings are large and narrow, don't plant many kinds of trees, otherwise it will help to shade them; Only the sparse left and right behind are densely planted to block their emptiness.
Four, the courtyard tree size
It is more suitable to plant big trees in the yard, and different feng shui schools have different requirements. In geomantic omen, the formal school thinks it is appropriate to plant rows of big trees around the house to stop the suffocation. In order to supplement the situation, when the house is built on the plain or in a wide place around it, trees and flowers can be used to create a four-god pattern of "Zuo Qinglong, Zuo Baihu, Qian Suzaku and Hou Xuanwu", that is, big trees are planted in the back of the house, medium trees are planted on the left and right sides, and short shrubs or grass are planted in front. This way is understandable from the aesthetic point of view, which meets people's psychological needs of finding a "land of geomantic omen".