The invention relates to a device for a vertical or angled arrangement of the hydroponic cultivation of plants (16), including at least one module (12) defining an inner space intended for containing at least one nutritional substrate and plants, said device being defined by a front wall (30) and a rear wall (35) secured to the front wall (30), at least the front wall (30) being provided with at least one opening (24) for plants to pass therethrough, and the front (30) and/or rear (35) wall comprising an attachment area for attaching the module (12) to a mounting (18). The the front wall (30) and/or rear wall (35) comprises overlapping edges (41, 42) enabling, when the device is installed on a green roof or a green wall comprising at least two adjacent modules (12), the modules to overlap at least partially in the roof or the wall.
