The pot (1) has a pot liner (21) for accommodating a pot insert (11). The insert is provided with a set of through holes (14) for roots (3) of a plant (2). A free space (30) is formed between the insert and the liner for carrying the roots of the plant. The liner is formed as a part of a ball (22), as cylinder section or as box-shaped or cubic hollow bodies. The liner is made of a transparent material. The insert consists of bars (12) arranged to each other with lateral distances. The bars are made of wood, clay, metal, glass or plastic.