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Self-watering device for pots, in particular for double-walled pots, in which an outer bottom and an inner bottom is defined, characterized in that it consists of a substantially flat base, engageable in the perimeter stairway of the inner wall of the wall. The flowerpot, sensibly distanced from the inner bottom of the same, so that said base forms with the bottom of the pot a container containing irrigation water, which the plant accesses through a plurality of tiny holes that are affected all the surface of said base, which has signaling means of the water level existing at each moment in said chamber. (Machine-translation by Google Translate, not legally binding)