The present invention relates to a sealed box (1) for plants, comprising side walls (5) and two walls, one top wall (4) and one bottom wall (3), defining a closed space suitable for housing at least one plant (10) or similar, at least one lighting device (20) and a bottom reserve portion (6) at least partially filled with water, characterised in that said box includes a misting device (9) connected for supply purposes, via a water pump (7), to said bottom reserve portion (6) such that the water circuit of the box (1) operates as a closed circuit.
