PROBLEM TO BE SOLVED: To provide a greening device growing plants only by natural precipitation even without a special water sprinkling equipment, forming a full-scale garden on a rooftop of a building, reducing heavy load to a building to the utmost, and free from fear of water leakage.SOLUTION: A planting container 401 is composed of a perforated cover body 402, and a water storage container 403 which is set with an incision 408 for overflow on a side wall and a perpendicular groove 406 connected to the incision, and vertically and horizontally forms a raised bottom 403b for draining on the bottom. The planting container has an inner wall 407 which projects from the inside of the water storage container 403, abuts on the perforated cover body 402 and sets a flow opening. A soil layer 412 to be laid on the perforated cover body 402 is wood-base lightweight soil which is for adsorbing water transported by evaporation from water stored in the water storage container or by humidity difference, and has charcoal and decayed wood chips as the main material. The soil layer has large water retaining power to lessen evaporation of water to the atmosphere. Charcoal 411 adsorbs water in lower half container atmosphere and supplies to plants. The planting container 401 stores an amount of water necessary to grow plants.COPYRIGHT: (C)2009,JPO&INPIT【課題】特別な灌水設備が無くとも天然降水量のみで植物が生育でき、建物の屋上に本格的な庭園を構築でき、建物への荷重負荷を極力軽減でき、漏水の恐れも無い緑化装置を提供する。【解決手段】植栽容器401は、有孔蓋体402と、側壁に溢流用切欠408とこれに連続する鉛直溝406を設け底面に排水用の上げ底部403bを縦横に形成する貯水容器403とからなり、貯水容器403の内面から突出して有孔蓋体402に当接すると共に通水用の開口を開設する内壁407を有する。有孔蓋体402に載置する土壌層412は、植栽容器に貯留する水より蒸発あるいは湿度差によりトランスポートされる水分を吸着するための木炭及び腐朽した木材チップを主たる材料とする木質系軽量土壌であって保水力が大きく大気中への水分の蒸発が少ない。木炭411が下半容器部大気中の水分を吸着して植物に供給する。植栽容器401は、植物を生育するに必要な水量を貯水する。【選択図】図13
