Abstract: The invention relates to a wall component and track system (1). System (1) has a plurality of tracks (10) for secured horizontally against a wall (2) at spaced intervals, and a plurality of wall components (20) adapted to be placed between adjacent tracks, each component having upper and lower engagement members (23A,23B) and (22A,22B,22C,22D) to releasably engage with a track above and below a component. The components each having a front face (21) A with apertures X to receive plants. The invention also relates to a wall system with at least one cover plate for placement between rows of wall components to hide the irriga tion pipes and the space between rows of components.