The reason for the death of fresh cut peony flowers in three or four days is improper management. According to relevant public information, the flowering period of peony is usually about half a month. If it is not properly managed, it will wither in three or four days. If you want to have a longer flowering period, you should pay attention to the water quality, change the water frequently and trim the branches frequently. Fertilization is usually needed every 7- 10 days, so that the nutrients are enough to keep fresh for a longer time.