A plant wall, comprising a plurality of stackable, elongated container elements, and a plurality of non-woven bags, whereby inside each container element can be accommodated at least one plant for growing, such that the roots of each plant set for growing are introducible inside a non-woven bag provided with pores, each container element comprising an elongated receptacle provided with a floor, said floor having its laterally directed end sides fitted with upward directed end walls and its longitudinally directed flank sides fitted with upward directed flank walls, comprising a rear flank wall that extends at an angle of about 90 degrees upward from a level of the floor, as well a front flank wall that extends at an angle of about 20-50 degrees, preferably at an angle of about 30-45 degrees, upward from the floor level and at the same time away from said rear flank wall, said rear flank wall having its top edge formed with a container support extending in the plane of the rear flank side's top edge towards the opposite front flank wall, such that upon said container support can be seated the floor of an upper container element located above said container element in such a way that the upper container element and the lower container element extend lengthwise co-directionally, the container support having such a length in the lengthwise direction of the end walls that between a free edge of the container element's container support and a top edge of the front flank wall is left what in a view upward from the container element's floor is a void space or opening, characterized in that - each non-woven bag is capable of being positioned inside a container element, on the floor of said container element, such that the stem of a plant set in each non-woven bag for growing extends upward from the floor of the container element, the manufacturing material of said non-woven bag consists of a so-called nonwoven fabric, wherein the fabric is produced from a porous plastic-based material by bonding long fibers or filaments to each other mechanically, thermally and/or chemically in such a way that the bag has such an average pore density per unit area that the bag is permeable to both water and nutrients possibly dissolved in water, yet is capable to retain water for more than ten seconds in a wet condition, as well as is capable of blocking the admission of light from the area between the top edge and the front flank wall by not less than 90% to the root system of a plant once the plant has its roots placed inside the bag, and - there is a liquid connection from the upper container element to the lower container element by way of a first overflow pipe as well as a possible second overflow pipe fitted with a flooding valve, and - from the lower container element extends to the upper container element a liquid inlet pipe running in conjunction with the first overflow pipe. - each non-woven bag is capable of being positioned inside a container element, on the floor of said container element, such that the stem of a plant set in each non-woven bag for growing extends upward from the floor of the container element, the manufacturing material of said non-woven bag consists of a so-called nonwoven fabric, wherein the fabric is produced from a porous plastic-based material by bonding long fibers or filaments to each other mechanically, thermally and/or chemically in such a way that the bag has such an average pore density per unit area that the bag is permeable to both water and nutrients possibly dissolved in water, yet is capable to retain water for more than ten seconds in a wet condition, as well as is capable of blocking the admission of light from the area between the top edge and the front flank wall by not less than 90% to the root system of a plant once the plant has its roots placed inside the bag, and - there is a liquid connection from the upper container element to the lower container element by way of a first overflow pipe as well as a possible second overflow pipe fitted with a flooding valve, and - from the lower container element extends to the upper container element a liquid inlet pipe running in conjunction with the first overflow pipe.