PROBLEM TO BE SOLVED: To provide a planting washer achieving further sure prevention of weed propagation, and to provide a method for attaching the same.SOLUTION: A planting washer 1 prevents weed propagation from a planting hole part 102 by forming the planting hole part 102 on a weed-proofing sheet 100 laid on the ground, and covering the planting hole part 102 after plantation on the ground exposed from the planting hole part 102. The washer includes a disk part 10 having in the center a hole part 12 for arranging the stem of a planted plant and a plate surface larger than the planting hole part 102, a rib 20 arranged in a standing condition from the plate surface of the disk part 10, and a tape 30 having stickiness on both surfaces for joining the circumference of the planting hole part 102 on the weed-proofing sheet 100 and the circumference of the plate surface of the disk part 10. The disk part 10 has a lotus-like part 14 having a fan-like deletion part 15, and a fan-like part 16 fitting into the deletion part 15 and attachably and detachably formed on the lotus-like part 14. The rib 20 is arranged in a standing condition in a nearly cylindrical form of a size of surrounding from the disk part 10 to the circumference of the ground exposed from the planting hole part 102.COPYRIGHT: (C)2013,JPO&INPIT【課題】雑草の繁殖をより確実に防止することを実現した植栽ワッシャ及びその取付方法を提供する。【解決手段】地面に敷設した防草シート100に植栽用孔部102を形成し、植栽用孔部102から露出した地面に植栽した後に植栽用孔部102を覆って、植栽用孔部102からの雑草の繁殖を防止する植栽ワッシャ1であって、中心に、植栽した植物の茎が配置される孔部12を有し、植栽用孔部102より大きい板面を有する円板部10と、円板部10の板面から立設するリブ20と、防草シート100における植栽用孔部102の周囲と円板部10の板面の周囲とを接合する両面に粘着性を有するテープ30とを備え、円板部10は、扇形の欠落部15を有する蓮形部14と、欠落部15に適合し、蓮形部14に着脱自在に形成された扇形部16とを有し、リブ20は、円板部10から、植栽用孔部102から露出した地面の周囲を囲む大きさの略筒状に立設する。【選択図】図1