No because it means just what it seems to mean. It's a metaphor comparing you to a flower.
The idiom "advancing years" refers to getting older or growing old. It implies the passage of time and the aging process.
He told me I had won, but I thought he was pulling my leg.
Let's meet at a restaurant and get a bite to eat.
Having a green thumb. (Being successful with plants and ACTUALLY planting the plants.)
My sister always "cracks me up" with her jokes.
"I'm so nervous about tonight i have 'Butterflies in my stomach'."
It is an idiom, because it does not use the term "like" or "as".
There is no English idiom for chiki because that is not an English word. Maybe it is a slang term?
John loved to dance and would do so at the drop of a hat.
It's not an idiom because you can figure it out by the context. It means they went bald.
"The pengiun is as petty as the flower"
You're going to be broke soon if you don't get job and stop spending money.