[PROBLEMS] To provide a method for producing an eastoma that can prevent rosette formation without requiring a large refrigeration facility, and has less problems such as abnormal flowering and reduced germination rate, and can further reduce the labor burden for management. To do. [Solution] A seed having a particle size that can be separated from the seed, a carrier having water retention, a mixing step of mixing water, and the mixture obtained in the mixing step is prevented from being rosette. A seed cooling step of storing at a temperature exhibiting an effect, and seeds obtained by the seed cooling step are sown, raised, planted, cultivated and flowered to produce a flower. [Selection] Figure 1【課題】大きな冷蔵設備を必要とせずにロゼット化を防止することができ、かつ開花の異常や発芽率の低下等の問題が少なく管理のための労力負担もより軽減できるユーストマの生産方法を提供する。【解決手段】ユーストマの種子、前記種子との分離が可能な粒径を有する粒子からなり保水性を有する担体、及び水を混合する混合工程、及び、前記混合工程で得られた混合物をロゼット防止効果を示す温度で保管する種子冷工程、を有し、前記種子冷工程により得られた種子を、播種、育苗、定植、栽培して開花させることを特徴とするユーストマの生産方法。【選択図】図１
