A tank housing a vertical farm, having inside a plurality of structures at different heights that are held on the tank wall such that they form ring-shaped projections on which to place the trays for the crops and the remaining installations and channels, wherein, since the structures are arranged as rings, a hollow space is generated in the central axis of the tank that is used to install a height-adjustable platform so that an operator or robot may access the different trays holding the vegetables, and wherein on the bottom part of the tank are located certain closed and sealed compartments intended for the hydraulic, electric and electronic systems for setting the parameters necessary for crop optimisation.