PROBLEM TO BE SOLVED: To provide a production method of Panax ginseng which can shorten cultivation period.SOLUTION: A seed subjected to forced sprouting treatment is subjected to low temperature treatment at a temperature not capable of sprouting, subsequently is seeded, and is allowed to sprout. A sprouted seedling is allowed to grow for 100 to 120 days under the atmosphere containing CO2 of higher concentration than the air, while keeping a light intensity which can promote growth. Roots whose above-ground part is dead are allowed to sprout after dormant for 90 to 120 days, and the sprouted seedling is allowed to grow for 100 to 120 days under the atmosphere containing CO2 of higher concentration than the air, while keeping a light intensity which can promote growth.COPYRIGHT: (C)2016,JPO&INPIT【課題】栽培期間を短縮することができるオタネニンジンの生産方法を提供する。【解決手段】催芽処理された種子を発芽しない温度で低温処理した後、播種し、発芽させる。発芽した苗を大気中に含まれるよりも高い濃度のCO2を含む雰囲気下、生育を促進可能な光強度に保持して100~120日間生育させる。地上部が枯死した根を90~120日間休眠させた後出芽させ、出芽した苗を大気中に含まれるよりも高い濃度のCO2を含む雰囲気下、生育を促進可能な光強度に保持して100~120日間生育させる。【選択図】 図1