The facility is of the type that has a pair of side bars (1,1) acting as inclined supports for an upper sheet (2) with openings (8) for inserting the plants, a closed lower sheet (4) acting as a collector, and at least one intermdiate sheet (3) with openings determining a cascade trajectory for the water with the nutrients. The invention consist in providing a multi-layer uppersheet (2) comprising preferably four layers (2a,2b and 2d), which together define narrow Channels (7) for selective use, such that at the time of insertion, the root of each plant is placed in a chanel (7) different from that used by adjacent plants. Furthermore according to the invention, the openings (8) for the insertion of the plants form two marginal and longitudinal lines. In this way, the roots of the adjacent plants can be completely isolated during the first growth phase thereof, preventing interference therebetween and allowing plants with different growth rates and even different types of plants to be arranged on the facility
