Flowering of Watsonia laccata as influenced by corm storage and forcing temperatures

► Using clonal W. laccata corms, the effect of temperatures during corm storage, forcing, and their interaction on growth and flowering were investigated. ► Corm formation is favored at low temperatures, resulting from an early initiation of daughter corms following flowering. ► Flowering of W. laccata is accelerated and promoted by forcing at low temperatures around 18 ° - 20 ° /15 ° - 17 °C for 8 weeks followed by 2 to 4 weeks of 27 ° - 29 ° /24 ° - 26 °C. ► No malformation of florets was found when plants were forced at high temperatures, and the length of scape and inflorescence was not affected significantly by forcing temperature.