Well, I think the story could be interesting with a little polishing, BUT- I have to be honest, the characters come across as stock to me. We have the well-intentioned heroine who is in the midst of discovering herself, we have the eternal optimist who grates, and we have the tomboy...the triplets sound like stereotypes that have popped up here on the board, time and time again. When you write the story, just make sure the characters have depth to them, and don't rely on things happening to them in order to shape their identities. That is my advice.
As for the names...I have to agree with Amphelise in that the flower theme is a little tacky. I would go with their middle names; I think they are more "grounded", and that they sound better, but that's just me.
"An intellectual says a simple thing in a hard way. An artist says a hard thing in a simple way." -Charles Bukowski
"And by the way, dearie, your punctuation sucks canal water!" -The ghost of VivianVance