A wall module system (2) comprising a plurality of vertically displaced pots (6, 6, 6", 6"), where the wall module system (2) comprises one or more tracks (4, 4, 4", 4") constituting a base for mounting the pots (6, 6, 6", 6"), where the pots (6, 6, 6", 6") are configured to be attached to one or more tracks (4, 4, 4", 4"), where each pot (6, 6, 6", 6") is provided with means for draining excess water (22), characterised in that each pot (6, 6, 6", 6") is provided with a water reservoir (52) inside the pot (6, 6, 6", 6"), and a drainage member (10) that is configured to drain excess water (22) from the pot (6, 6, 6", 6") in such a manner that the excess water (22) is conducted to an underlying pot (6, 6", 6") without bringing the excess water (22) into contact with a media such as potting soil, when the media such as potting soil is filled into the pot (6, 6", 6").
