The prop, which can be used in particular for supporting vines, consists of a profiled part made from a piece manufactured by injection or extrusion of a plastic material and preferably has the shape of a Y in section. Notches (6) are made on the longitudinal ridges of the upper part (1) which is intended to protrude above the ground, these notches serving as attachment means for receiving fasteners; moreover, the profiled part has a lower part (2) which is intended to be planted in the ground and the end (3) of which is tapered. <IMAGE>
