PROBLEM TO BE SOLVED: To provide a method of improving production efficiency of a cedar rooted cutting to equalize picking scion work and rooted cutting work, in mass production of the cedar rooted cutting.SOLUTION: In a method of producing a cedar seedling, a cedar scion after planting is cultured in a facility in which temperature is adjusted, and the cedar scion is used as a cedar seedling. The cedar scion is picked in autumn or winter, and a low-temperature treatment is applied for the scion before planting.