The plant cultivation facility is characterised in particular in that it uses: a greenhouse (1) comprising a light-transparent roof (3) mounted on a load-bearing framework formed by roof bows (10) implanted in the ground and stringers (11) connecting the roof bows to one another； earth tubes (4) installed in the ground under the internal space of the greenhouse (1), said earth tubes being in a heat exchange relationship with the internal space of the greenhouse； optionally a heat-storage capacitor (5) distributed around the earth tubes (4) and in a heat exchange relationship therewith； and at least one circulation means (6) allowing air to flow between the greenhouse (1) and the earth tubes.
