A good friend of mine who married a while ago, gave me a wonderful tip! Check your local grocers, since the flower are a 1/3 of the cost, they are fresher and more willing to work with you. Keep in mind, in my wedding, we are using the flowers for the ceremony only, but the this is saving us a bundle.

Just a note on this, not all grocers will be able to provide the full service you may need, but I only ran into that issue with one of them, the rest were great!