Green Concrete is a concrete on which plants directly grow. It consists of a continuous void concrete, a weter retentive material in the void and thin soil layer sprayed on the surface. The continuous void concrete is made of single sized crushed stone and low alkaline cement paste. Chopped peat moss containing fertilizer is used as the water retentive material. Seeds are mixed with the soil germinate. The optimum compressive strength of the concrete was approximately 10 to 15 N mm^2 when the void ratio was approximately 30 percent. It was demonstrated that herbaceous plants sufficiently grow on Green Concrete.
