actually, it technically does have relevance. Its just not as important as you thought it’d be.
Assuming you haven’t finished the story
(spoiler warning)
MC ends up having some sort of spiritual powers similar to princess Bari. The spiritual power also helps add conflict;; Your lover, or your long time friend.
So in a way it does have relevance, but its not too important.
The title is Prince Bari, and we're taking about the Process Bari'S flower, and the gardener's flower. The flower's name is not Bari. They can't " THIS FLOWER" all the time. So having the gardener's name on the title...... It just doesn't make sense. I completely understand that in order to rescue his lover, and because of the flower's greediness (characteristics) he gave up everything, but there are more than 90 chapters released during 4 years . So I think it's too much work to just post it under such a title: prince Bari ( not even the flower's name, just the gardener's name). Maybe it has other title in its original language. I hope so.
The title though.... Really,... it almost has nothing to do with the story. So confusing!