PROBLEM TO BE SOLVED: To provide a plant base which can reduce the weight than before, and plant plants without requiring labor including maintenance management.SOLUTION: The plant base 1 comprises a root resistant layer 2 laid on a top face of a structure B, a first planting layer 3 laid on a top face of the root resistant layer 2, and a second planting layer 4 laid on a top face of the first planting layer 3, wherein the first planting layer 3 consists of first culture soil 6 obtained by mixing inorganic material and organic material, and a drain channel 8 laid adjacently to the first culture soil 6, and the second planting layer 4 consists of second culture soil 7 obtained by mixing the inorganic material and organic material at a mixing ratio different from that of the first culture soil 6.COPYRIGHT: (C)2015,JPO&INPIT【課題】従来よりも軽量化を図ることができ、かつ、維持管理を含めて手間をかけずに植物を植栽することが可能な植栽基盤を提案する。【解決手段】構築物Bの上面に敷設された耐根層2と、耐根層2の上面に敷設された第一植栽層3と、第一植栽層3の上面に敷設された第二植栽層4とを備える植栽基盤1であって、第一植栽層3は、無機物と有機物とが混合されてなる第一培土6と第一培土6に隣接して敷設された排水路8とからなり、第二植栽層4は、第一培土6とは異なる配合により無機物と有機物とが混合されてなる第二培土7からなる。【選択図】図1
