When you are planning a large wedding or some other occasion, the best decision you can make is to hire florists to do the job for you. When you decide to do this, there are many things that you have to do yourself so that you can be precise and clear as to what you want and what to expect. In this situation the old adage of catching more flies with honey that with vinegar really applies. When you meet with your florist, try to make it a friendly meeting so that you can work with them and not give the impression that they are working for you. This will work out better in the long run for everyone involved. Find a florist that is truly going to take an interest in what you are doing and the effect that you want.
If you are working with a budget, make sure the florist is aware of what that budget is and that you are firm in the price you give. Hopefully if that florist is as good as they ought to be, he/she will work within that budget and make your show of flowers one that will be remembered not only by you but with the guests that are attending. A florist can do wonders with very little. He/she is in a trade where a person has to be creative. Try to get a good working relationship going with your florist and it will be less headaches for you and everyone concerned in the long run.
A florist is there to provide you with a service. If they do their job well, it is free advertising for their business no matter what the function is. So if this person is a good florist, he/she will want to do a good job for you - one that will stay in people's minds and could prove to be business for them in the future. Go to your florist prepared with what information you need to give them, and make sure you are very specific with this information, maybe with this will help