Flower pot for plants with a water reservoir and comprising an outer housing (1) made of material which is impermeable to the water retained in the compost (4), wherein the flower pot, at its bottom, underneath said compost (4), contains means (2 11 12 14 16, 17) suitable for delimiting a retaining space of the water reservoir (10), said means being suitable for transferring the reservoir water (10) to the above compost (4) by capillarity.