A method and a plant for the production of a rim for a wheel of a vehicle. At first and by means of an additive manufacturing process, a temporary rim is manufactured, which is provided with a central hub, with a raw ring arranged around the central hub and with a series of spokes, which are radially arranged and connect the raw ring to the central hub; subsequently, the temporary rim is subjected to a flow-forming process, which deforms the raw ring determining an axial lengthening thereof, which transforms the raw ring into a channel having the desired final shape.