Abstract: A wall modular member (1) for cultivating plants, is associated with at least one adjacent similar member (1?) for forming a vertical or inclined vegetal screen on a frame extending in a vertical or inclined plane. The modular member (1) includes at least: a bearing plate (2) that can be coupled with the frame; a gravity flow circulation vector for an aqueous nutriment solution for the plants in the form of a ply or sheet material (6) covering the bearing plate (2); and elements for retaining and/or attaching the plants to the member, in particular to the circulation vector. The vector-defining ply or sheet material (6) extends beyond at least one edge of the bearing plate (2) and defines with its portion protruding from the plate (2) edge a so-called partial-overlap connection strip (9, 10) with an adjacent and similar wall modular member (11).