The present invention relates to a landscape tree planting method that can easily plant a landscape tree such as a street tree on a sidewalk, etc. and ensure a good nurturing condition, and a landscape tree planting method that can easily plant a landscape tree such as a street tree on a sidewalk, etc. Disclose the case used therein, performing excavation so that the original ground is exposed in the area where the sidewalk and the road will be formed, and sequentially performing the formation of a compaction layer and installation of a boundary stone for the area corresponding to the road among the excavated areas After paving the road, after the boundary stone of the road is installed, the unit blocks are assembled at a position to plant a street tree, which is a landscape tree in India, which is in contact with it, and a case is formed with a vertical penetration hole to secure the original ground for planting the street tree step, paving the sidewalk by sequentially performing compaction layer formation, sand lamination and packaging in the sidewalk area except for the area where the case is placed, and placing the street tree inside the case after the sidewalk is paved step, taking out the case in a state in which the street trees are arranged, filling in soil for vegetation in the space where the case is drawn out, and installing a rim member on the top of the filled soil to protect the area where the street trees are planted includes steps.
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