This planter has at least one side wall (3) and a bottom wall (2) defining a receiving volume, open on one side, a substrate (19) for cultivating at least one plant (6). It comprises a member (12), removable, at least partially closing the opening of the volume of the planter and in that the member (12), in the closure configuration, is not in contact with the substrate (19) and delimits a buffer zone (17) separating the substrate (19) from the outside.
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