Flowers bloom as scheduled, which means that there is always a date for the flowers to bloom.
"Flowers will bloom for a certain period of time" comes from two poems by the Song Dynasty poet Xu Nei Pu's poem about appreciating fermented wine and urging him to drink wine.
The original text is:
Flowers bloom again, and people are no longer young.
When we meet each other, there is no need to be fragrant and fresh.
Vernacular translation: Flowers bloom again one day, and once people grow old, they will never become young again. You and I are going to get extremely drunk when we meet, so why prepare delicious dishes to go with the wine?
"Flowers will bloom again, and people will never be young again." This sentence means that flowers will bloom again, but once people grow old, they will never be young again.