PROBLEM TO BE SOLVED: To provide technique for improving such a situation in which, in production of a rooted cutting of the genus Larix including a hybrid of the Larix gmelini F1, supply of the cuttage seedling falls far short of demand of the cuttage seedling, and establish the technique for increasing a scion production amount which is required in production of cuttage seedling of the genus Larix.SOLUTION: There is provided a growing method of the genus Larix in which, in a first step, in a closed seedling raising facility, the genus Larix from which a top branch is removed, is installed under an artificial illumination so that, a distance between a tip part of the top branch after the top branch is removed therefrom and the artificial illumination becomes 4-10 cm, then generation of a scion produced from the tip part of the top branch after the top branch is removed therefrom or the vicinity thereof, is produced.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】グイマツ雑種Ｆ１を含むカラマツ属植物の挿し木苗の生産において、挿し木苗の供給が需要にはるかに及ばないといった状況を改善するための技術を提供すること。 そのために、さらに採穂量を増大するための技術を確立することは、カラマツ属植物の挿し木苗の生産における急務であった。【解決手段】閉鎖型育苗施設において、頂枝を切除したカラマツ属植物を、切除された後の頂枝の先端部と人工照明との距離が４ｃｍ～１０ｃｍになるように前記人工照明の下に設置し、前記切除された後の頂枝の先端部又はその近傍からの採穂され挿し木される穂の発生を促進する第１の工程を含む、カラマツ属植物の増殖方法。【選択図】なし
