According to geomantic omen, "peach poplars are planted in the east, plum dates are planted in the south, elms are planted in the west and plums are planted in the north", so elms can only be planted outside the west wall of the yard. Platanus acerifolia should be planted in the east.
Feng shui believes that when the surrounding area is large and narrow, it is not suitable to plant a variety of trees, otherwise it will help to shade it; There are already eight poplars in your yard, which is not suitable for planting any more.