A container for an ebb-flow plant growth system, said container comprising a support for plants, wherein said support extends between opposite sidewalls dividing the interior space of the container in a lower interior space and an upper interior space, and wherein the support further comprises through holes to allow passage of fluid between the lower interior space and the upper interior space. The container also comprises) a gas duct in communication with the lower interior space. To reduce and/or facilitate maintenance, the gas duct comprises a threshold portion upstream of the downstream end of the gas duct, which threshold portion comprises a lowest point located higher than the support.
