1. If you have a choice, you can plant osmanthus trees on the left side of the door (Qinglong side) and orange trees on the right side (White Tiger side), which can comply with the Feng Shui pattern of wealth and good fortune entering through the door
2. If not, then you can plant alternating orange trees and osmanthus trees in the Qinglong side you mentioned.
3. However, after the trees grow up, remember to prune them regularly to avoid messy branches and leaves