Search For A Poem by H.S.H. Princess Grace

I believe I was age 12 when I first read a certain poem by Princess Grace of Monaco. I memorized the poem, but alas, have since forgotten some of it. Here's what I can recall (even though these pieces may not be entirely accurate):

Little flower, you're the lucky one
You soak in all the lovely sun
You let it all (?) go passing by
And never once do bat an eye

But you must, too, have wars to fight
The cold, bleak darkness of every night
Of stronger vines that seek to grow
Rain, hail --(?)-- and snow

Yet, you never let it show
On your pretty face

That's the best my childhood memories can produce. So, please, if anyone knows this poem...I would love to hear it again!