PROBLEM TO BE SOLVED: To provide a three-dimensional garden sustainable without applying loads to a building.SOLUTION: A latticed frame 52 for supporting a tree 51 is attached on a roof top or on the floor of a balcony. The tree 51 is placed on the latticed frame 52, and the tree 51 is supported by binding the root 36 of the tree 51 and the latticed frame 52 together, or binding the latticed frame 52 and a support together and binding the support and the tree 51 together. An irrigation space 20 is set by placing aggregates 122 under and in the periphery of the latticed frame 52, and water is fed to/drained from the irrigation space 20 to irrigate the tree. A management space 40 is set by placing the aggregates 122 in the periphery of the latticed frame 52, so that extra roots 36 coming out of the latticed frame 52 are cut and removed, and the management space 40 is cleaned. A water-retaining floor board 121 is disposed in other places than the irrigation space 20 or the management space 40 on the floor surface, so that rain water or sprinkled water on the water-retaining floor board 121 is retained. The retained water is made to flow into the irrigation space 20.【課題】建築物に負担を与えずに持続可能な立体庭園を提供する。【解決手段】屋上またはバルコニーの床上に樹木51を支持するための格子状骨組52を取り付け、格子状骨組52上に樹木51を置き、樹木51の根36と格子状骨組52を緊結または格子状骨組52と支柱、支柱と樹木51を緊結することによって樹木51を支持し、格子状骨組52下及び周りに骨材122を置いて潅水スペース20を設け、潅水スペース20の給排水をすることによって樹木に潅水し、格子状骨組52周りに骨材122を置き管理スペース40を設けることによって、格子状骨組52から出てきた余分な根36を切断除去及び管理スペース40の清掃を行い、前記潅水スペース20及び管理スペース40以外の床上に保水床版121を配置し、保水床版121上の雨水または散水を保水し、保水した水を潅水スペース20へ流すことを特徴とする立体庭園である。【選択図】図１
