Mood Board
It's a good idea to start a scrapbook or create a mood board with cuttings of flowers, colours and designs that you particularly love. Your florist won't want to produce a carbon copy of a design you've seen - after all your wedding is unique to you- but it gives him/her a feel for your style and preferences.
Time of Year
If you are getting married at Christmas or New Year (very romantic but brings its own problems!) take your florist's advice about availability, freshness and cost.
Is your wedding close to Valentine's Day or Mothers' Day? Be aware that some flowers will be much more expensive than usual. Your florist will guide you in your choices, but be prepared to consider having less flower displays or upping your budget if you have firm ideas about the flowers you want!
Eco-friendly and Ethical
If you want to minimize your carbon footprint make sure your florist knows this at the outset. Choose locally grown and seasonal flowers. Fair trade flowers are also increasingly available. Your choice of flowers will be more limited, but is offset by being able to stick to your ideals.
Allergies
Do you or any of the main bridal party suffer from hayfever, asthma or other allergies? Some flowers have a very strong perfume or produce lots of pollen and are best avoided.