1. From the perspective of geomantic omen, willow trees are shade trees, and houses facing south correspond to five elements. House foundation soil, the former Suzaku (south) yang fire (pool neutralization), the latter Xuanwu (north) yin water (taking the rock as the town), Zuo Qinglong (east) wood (mountain stream raising), and right white tiger (west). Therefore, as the saying goes: the front door is planted with sunshine, and wealth is not long; Planting willows in the back door will soon make a fortune. The older generation said: plant willows in front of the house and mulberry in the back. This is a symbol of the land of feng shui. And the willow in the backyard: gathering shade, easy to become a demon, attracting peach blossoms.
2. Scientifically speaking, willow trees are cold-resistant, waterlogging-resistant, drought-resistant, like wetlands, warm to high temperatures, and have plenty of sunshine. It can absorb urban sewage, landfill leachate, industrial waste water (such as waste water from wood storage plant after spraying logs), sewage sludge, sawdust, etc. Mainly through plant absorption to reduce pollutants and excessive nutrients in water and soil. So it grows best in the east and south. Although plants grow better near sewers or pollutants, trees will suck poison from their hearts and change their origins.