A support system (1) for at least one plant (10), in particular for a vine, comprising a plurality of upright elements (2) spaced apart from each other along a predetermined direction (X), and one or more transverse support wires (4) for the plant, connected and extending between at least one pair of upright elements (2)； said system (1) being characterized in that at least one support wire (4) is made of weathering steel. The invention further concerns a support wire (4).
