Wikipedia has more on Anthophobia
Anthophobia (from Greek anthos, "flower") is the fear of flowers. It is a branch of botanophobia, the fear of plants. Some people with this phobia fear all flowers, while others only fear specific types.
Causes of anthophobia include negative experiences involving flowers, including those in fiction, such as scary scenes in movies or TV shows involving flowers. A severe allergy to flowers may trigger anthophobia. A person may also fear flowers because of the insects, such as bees, that may be hiding within them, or the possibility that a flower is poisonous. Those with food-related phobias may fear flowers that are commonly used for cooking.
The symptoms of anthophobia, as with any phobia, include breathlessness, dizziness and excessive sweating. Different people experience this phobia in different ways and may have different symptoms as such.
Anthophobia may not need serious attention as this phobia doesn't often have roots, but it can be treated using hypnotherapy or anti-anxiety medication.