抄録
Eighty ornamental plants, such as perennial plants, bulbous plants, and shrubs, were planted into the experimental rooftop garden made of the rain water storage type planting base, and the growth experiment was conducted. The selected species differed widely in their form characteristics and weatherability. As a result, the following things became clear. (1) Various vegetable kinds were able to grow over four years, even under growth condition of thin substrate depth of 10cm. (2) The vegetable bloom time and flowering period have been confirmed. The vegetable selection which can enjoy plants in blossom may become easy. (3) Even at the thin layer planting base, control of maintenance which reduced irrigation frequency was completed by adopting the rain water storage type planting base.
