FIELD: agriculture.SUBSTANCE: invention relates to the field of plant growing without the use of soil. Leaves (91) of the grown plant are obtained by cutting the lower portion of leaves (92) from the root of the grown plant. Device comprises an element with fluid channel (41) formed with a fluid passage through which supply fluid (44) passes. Element (41) is provided with a plurality of through holes on the upper surface of fluid channel element (41) separated from each other at a predetermined interval and disposed along the fluid passage. Device also comprises growth medium (44) for seedlings on which plant seeds are located. Site for retaining nutrient medium (45) of a cylindrical shape accommodates the seedling nutrient medium for its retention, is disposed in a plurality of through-holes of fluid passage element (41) and absorbs the nutrient fluid into the seedling nutrient medium. Support portion of leaf (46) is cylindrical, located on the upper side of the containment section, and supports leaves (91)
