This study was carried out to compare the seed germination and seedling growth of Fraxinus mandshurica growing in natural forests of the interior of Korea. Three stimulation methods were used for germination and the seedlings were planted with various densities. The results obtained were summarized as follows: 1) It was suggested that the 80 seedlings per square meter were proper densities for their growth at a nursery bed. 2) Among the three stimulation methods, 19.9% of germination was shown by the moisture storage, 2.3% by cold and warm stratification, and 0.4% by cold stratification. 3) The 8.1% of the total seedlings showed secondary height growth.