Such a container is characterised by a plant container for urban use of the type consisting of a single-piece vessel (1) comprising a permeable intermediate element for holding the topsoil (4), determining an upper compartment (5) for receiving the latter and a lower compartment (6) intended to be filled with water (7) in order to constitute a reserve. According to the invention, the container comprises, at its outside lower part, two longitudinal and parallel grooves (8) opening out on two opposing faces of the said container in order to constitute lower means for gripping by palletisation and delimiting hollow support feet (11) corresponding substantially to the lower compartment (6) with the reserve for water (7) on the one hand, and constituting reinforcements suitable for stiffening the structure of the container on the other hand. <IMAGE>