The subject of the present invention is a device for creating a wall (3) intended to be planted, comprising a reservoir (50) for storing liquid, particularly rainwater, a cage (40) extending vertically and intended to contain a substrate (42) for supplying liquid to the plants, means (30) of attaching the cage to a vertical wall (3) of the reservoir (50), and means (60) of watering the plants supplied with water by the substrate (42), the watering means (60) being supplied with water from the water reservoir (50).
