Problem: lightening the planting base where plants are planted.Solution: the planting base plate 10 is formed by planting planting sheets 30 and 32 which are formed by projecting planting sheets 30 and 32 stacked on both sides of the water retaining sheet 20, holding members 60 and 62 for holding the planting mat 50 from both sides, and between the lateral material 64 and the lateral member 64, and planting sheets 30 and 32 protruded from each other and plants 1 A housing 180 is provided with 4.Diagram【課題】植物が植栽される植栽基盤を軽量化する。【解決手段】植栽基盤10は、保水シート20の両面に植栽シート30、32が重ねられた植栽マット50と、植栽マット50を両面から挟んで保持する保持部材60、62と、横材64と横材64との間から植栽シート30、32が突出して形成され植物14が植栽される収容部180と、を備えている。【選択図】図7
