Consider a Seasonal Bouquet

When planning for a large gathering such as a wedding, florists are often just as unsure about the price as you are until well into the process. Karen Perry, owner of The Master's Bouquet in Bakersfield, Calif., which services over 100 weddings and big events each year, says that she offers "ballpark figures" during the initial consultation meeting, but that many variables affecting cost often don't come into play until later.
For example, flower arrangements for a recent wedding originally estimated at $2,000 ended up costing a total of $5,000, Perry says, after the clients added centerpieces for the reception and asked for some additional upgrades.
Knowing what you want ahead of time helps, since last-minute changes can factor heavily in the billing for big orders. Prices can be kept in check more easily when clients communicate their budget up front and ask for an itemized copy of the bill from the start, says Walter Fedyshyn, vice president of the American Institute of Floral Designers.
Another tip for trimming costs: Opt for flowers that are in season, like astors or zinnias in the summer and carnations or lilies in the winter.