Abstract: The present invention relates to vertical farming system comprising a hydroponic system, the hydroponic system comprising: a plurality of trays arranged above each other along a first extension direction, the trays each having a top side facing along the first extension direction, wherein the plurality of trays comprises a bottom tray, one or more intermediate trays and a top tray, the bottom tray being arranged at a bottom portion of the farming system, wherein the bottom tray faces with its top side toward the one or more intermediate trays and toward the top tray, wherein the top tray is arranged at a top portion of the farming system such that the one or more intermediate trays are between the top tray and the bottom tray, a liquid circulation system comprising a liquid pump, the circulation system being arranged and configured to pump a liquid onto the top side of the top tray and a liquid conduit system fluidically connecting adjacent trays of the plurality of trays, wherein the farming system is