Abstract: A raising seedling pot provided with passing parts on the side face and the bottom and capable of undergoing fracture is filled with a culture medium comprising a mixture of smoked charcoal or rice hulls with a water holding material, the raising seedling pot is immersed in a culture solution containing 1,000 to 1,800 ppm of a nitrogen component, 600 to 1,000 ppm of a phosphoric acid component, 1,500 to 3,500 ppm of a potassium component, 300 to 500 ppm of a magnesia component, and 900 to 1,400 ppm of a lime component, and nursery trees are raised using this culture solution.Thus, nursery tree growth is favorably affected and remarkably accelerated even after the transplantation of the nursery tree into soil.