A pedestrian walkway more than 2 meters wide, with shops and roads on both sides. A certain parking space should be reserved for shops. How to afforest a 2-meter-wide walkway is more reasonable?

First of all, it is not difficult to understand that parking is illegal if the municipal government does not plan parking spaces on the sidewalk, because there are also blind roads on the sidewalk.

Secondly, the first choice is to dig a tree pit to plant shrubs, because the tree is too high, which will block the driver's sight and the lighting of the shop. Tree species should be tailored to local conditions, and I don't know where you are from. Ligustrum lucidum with purple leaves is used as a hedge, while Populus alba, Platanus acerifolia, Catalpa bungeana, Eucommia ulmoides and Ulmus pumila are used as street trees.

There is really nothing to make a fuss about the wall. Petunia and pansy are used as flower walls, or flower baskets are hung from telephone poles on the roadside, and large flowerpots are made on the ground, where biennial plants can be planted, such as kale and a bunch of red flowers in Cruciferae. Forget perennial herbs or woody plants for the time being!