A comparative study between the effect of storage period and gibberellin on growth, flowering, and bulb production of Hymenocallis speciosa Salisb.

This investigation was conducted at the Ornamental Plants and Landscape Gardening Research Department, Horticulture Research Institute, Agricultural Research Center, Giza, Egypt, during the 2022 and 2023 seasons to study the influences of gibberellic acid (GA3) and storage periods on vegetative growth, flowering, bulbs productivity, and chemical constituents of Hymenocallis speciosa (spider lily) plants. A factorial experiment employing a randomised complete block design (RCBD), with three replicates was conducted over two seasons. The experiment incorporated two primary factors: duration of storage (0, 25, 35, and 45 days) and concentrations of gibberellic acid (0, 50, 100, and 150 ppm). The use of GA3 at a concentration of 150 ppm and a storage period of 35 days had a positive impact on the growth, flowering, and bulb yield of Hymenocallis plants. These results provide significant knowledge for horticulturists and researchers seeking to optimise cultivation methodologies for this particular species, indicating that GA3 may serve as an efficacious tool for enhancing plant performance under defined storage conditions. Subsequent investigations could examine the prolonged effects of gibberellic acid and its potential applications across diverse environmental contexts.