PROBLEM TO BE SOLVED: To solve the problem of plants being apt to wither in the shade particularly in a high altitude cold district due to the insufficient supply of water and the insufficient transfer of round heat in a planting block with a planting part provided in a concrete block. SOLUTION: A method of providing a wall body with an opening and installing insertable or replaceable planting boxes therein is adopted. A net of large area is installed at the bottom face of each planting box. The root elongation of a plant stops since the bottom face is exposed to light, but the growth of a round part continues while limiting a root area. The bottom face net part of the planting box inserted in the opening is dark being covered with back face soil but starts growing again when nutritious water is supplied. The subsequent growth is extremely smooth, so that the plants do not wither even in the shade in the high altitude cold district.
