An infiltration bed is a vegetated bed where the rainwater is retained temporarily until it has seeped into the soil. The vegetated area is designed with a top soil layer suitable for vegetation and with sand/gravel underneath which is suitable for infiltration. To manage overflow in connection with extreme rain, adjacent to the infiltration bed, an area may be designed which is suitable for infiltration and detention of the rainwater. Furthermore, a dry well may be installed beneath the infiltration bed.