What is the symbolic meaning of flowers?

Flowers have so many interpretations you can find whole books on the subject.

Here are a few to whet your curiOSity:

Flowers - happy thoughts

withered - disappointment

giving - offering solace or comfort; showing affection

receiving - a boost of self esteem

buttercup - childhood

cornflowers - calmness, serenity

geranium - renewed optimism

Rose - love (please note, the colour and number of roses is very significant)

tulip - fertility