Knowing exactly how much you want to spend is key, both for your own sanity and for your florist's. Whether or not you have a sky's-the-limit wedding budget (which, let's face it, almost no one does), setting a cap on what you're willing to shell out will save you both some headaches. If your florist knows how much you can spend, he or she can be more realistic about what's in his or her power to accomplish.