In this experiment, we focused on sterilization, but here we will summarize the research on nutrition necessary for prolonging the life of flowers, which was studied in the previous year. In the image next to it, there is a link to the nutrition site created last year, so please take a look. We used sugar to nourish the flowers, and in conclusion, granulated sugar was the best life-prolonging. Therefore, in this experiment, 5g of granulated sugar was added to all the flowers. Furthermore, the importance of "sterilization of liquid", which is the subject of this experiment, was also found in this experiment.