PROBLEM TO BE SOLVED: To provide a simple and practical seedling-raising method by which the growths of seedlings raised in seedling-raising connected containers can uniformly be arranged. SOLUTION: This method for raising the seedlings in an overcrowded group state in arranged and connected seedling-raising containers 8 is characterized by disposing walls having the upper edge ends at higher places than the upper ends of the seedling-raising containers 8 on the outer periphery of the connected seedling-raising container group. The walls preferably comprise plate-like members 1 which can be moved or assembled. The walls are preferably formed in such a height that the upper edge ends of the walls are positioned at higher places by 1 to 30 cm than the upper ends of the seedling-raising containers 8. COPYRIGHT: (C)2004,JPO&NCIPI