Flowers has its meanings

While it's certainly true that all flowers can express a multitude of sentiments, it is important to realize that different blooms represent varying meanings and emotions – be it sympathy, respect, love, innocence or passion.
Not sure which flowers say it best? Use this as a guide:

Sorry Seems To Be The Hardest Word (the best flowers to apologise):
Geraniums – stupidity, folly
Yellow Gerberas – I'll try harder to win your love
Orange Gerberas – You are the sunshine of my life

Don't Worry, Be Happy (the best flowers to brighten someone's day):
Freesias - thoughtfulness
Orange Roses – feelings of enthusiasm, fascination
Sunflowers – adoration, following the sun
Yellow Tulips – there's sunshine in your smile

Thank You For Being a Friend (the best flowers to say thank you):
Pink Roses – gratitude, admiration, appreciation, friendship, thankfulness
Peach Roses – gratitude, appreciation, admiration
Yellow Roses – joy, friendship

Be My Baby (the best flowers to express new love):
Red Tulips – declaration of love, believe me.
White Roses – spiritual love, happy loveLavender Roses – love at first sight, enchantment

I Will Remember You (the best flowers to express sympathy/condolences):
Forget-Me-Nots – memories, remembrance
Crimson Roses – mourning
Pink Roses – sympathyWhite Roses – reverence
Lily of the Valley – humility, new life
Chrysanthemums – passing of a life

An Apple A Day (the best flowers to express Get Well wishes):
Sunflowers – sunshine, following the sun
Orange Gerberas – you are the sunshine of my life
Freesias – thoughtfulness

Celebrate Good Times (the best flowers to say Congratulations):
Birds Of Paradise – magnificence
Lilies – magnificent beauty, wealth, pride, majestic
Sunflowers – adoration
Yellow & Red Roses - congratulations

I Will Always Love You (the best flowers to express true love):
Yellow & Orange Roses – passionate thoughts
Thornless Roses – love at first sightRed Roses – love, passion, respect, courage, I love you
Orange Lilies – flame, I burn for you