Device (1) for improving the conditions of plants in pots (2) and the like characterized in that it comprises at least one body (3) substantially laminar comprising a core (30) of moisture-absorbing material and comprising by, at least, one of its faces, a permeable sheet (31). (Machine-translation by Google Translate, not legally binding)1. Dispositivo (1) para mejorar las condiciones de las plantas en macetas (2) y similares caracterizado porque comprende, al menos, un cuerpo (3) sensiblemente laminar que comprende un núcleo (30) de material absorbente de la humedad y que comprende por, al menos, una de sus caras, una lámina permeable (31).