PROBLEM TO BE SOLVED: To carry out a vegetation of planting material on an artificial ground capable of not requiring a trouble and greening the artificial ground in a short period at a low cost by spreading a vegetation mat over a water interception or water permeable sheet. SOLUTION: A water interception or a water permeable sheet 30 is pasted to a concrete slab 50 forming an artificial ground. A watering pipe 20 capable of absorbing a necessity minimum amount of water is spread over the water interception or the water permeable sheet 30. Then, a planting soil composed of soil or artificial soil is rubbed in or packed into fiber gaps of a separately prepared base mat obtained by piling and forming fibers in a nonwoven fabric state and made into an integrated state to give a vegetation mat 14 for vegetating a plant, material 16 by seed sowing or seedling sowing. The vegetation mat is transported to an application spot in a rolled or flat plate-like unit mat and laid. Preferably the planting soil has a difference in density in the thickness direction of the base mat in which the planting soil is rubbed and packed and has change in air permeability, water retention, water permeability, etc.
