A system for cultivating plants comprising: a plurality of cultivation shelves for cultivating plants, support frames structured to support said cultivation shelves to form one or more horizontal cultivation levels/planes (Li) each of which extends along a first horizontal direction, an aeroponic feeding system, which is provided with nebulizing devices which are arranged below said cultivation shelves for spraying the liquid towards the cultivation shelves themselves, said cultivation system comprises a suction system that is arranged at said nebulising devices for sucking-up the nebulised liquid dispersed by the devices, said cultivation system being characterized in that: said suction system comprises: at least one liquid collection basin, which is arranged immediately below the cultivation shelves for said cultivation plane (Li) so as to extend along a direction approximately parallel to said first direction and is structured to collect and contain said dispersed nebulised liquid, and at least one suction duct which is designed to suck-up the liquid contained within the liquid collection basin itself, characterized in that said suction duct is arranged approximately adjacent to the bottom wall of said liquid collection basin and extends inside said liquid collection basin for approximately the entire length of the same along said first direction, on said suction duct suction through-openings are present, spaced from one another along a longitudinal axis of said suction duct. a plurality of cultivation shelves for cultivating plants, support frames structured to support said cultivation shelves to form one or more horizontal cultivation levels/planes (Li) each of which extends along a first horizontal direction, an aeroponic feeding system, which is provided with nebulizing devices which are arranged below said cultivation shelves for spraying the liquid towards the cultivation shelves themselves, said cultivation system comprises a suction system that is arranged at said nebulising devices for sucking-up the nebulised liquid dispersed by the devices, said cultivation system being characterized in that: said suction system comprises: at least one liquid collection basin, which is arranged immediately below the cultivation shelves for said cultivation plane (Li) so as to extend along a direction approximately parallel to said first direction and is structured to collect and contain said dispersed nebulised liquid, and at least one suction duct which is designed to suck-up the liquid contained within the liquid collection basin itself, characterized in that said suction duct is arranged approximately adjacent to the bottom wall of said liquid collection basin and extends inside said liquid collection basin for approximately the entire length of the same along said first direction, on said suction duct suction through-openings are present, spaced from one another along a longitudinal axis of said suction duct. at least one liquid collection basin, which is arranged immediately below the cultivation shelves for said cultivation plane (Li) so as to extend along a direction approximately parallel to said first direction and is structured to collect and contain said dispersed nebulised liquid, and at least one suction duct which is designed to suck-up the liquid contained within the liquid collection basin itself, characterized in that said suction duct is arranged approximately adjacent to the bottom wall of said liquid collection basin and extends inside said liquid collection basin for approximately the entire length of the same along said first direction, on said suction duct suction through-openings are present, spaced from one another along a longitudinal axis of said suction duct.