Plant pot (1) has openings (11,12,13,14) to water or to aerate the base of the pot (5) and ridge (6) on the base used to place pot on a surface and to leave the openings free, and a ridge at the edge leaving a passage (7) for water and air at the side. It is shaped so that the passage runs between two end areas (8,9) of the ridge which bend inwards.