Flower Votive Centerpiece: Flowers and candlelight are nothing new, but together they create tabletop decorations fit for a spring or summer wedding. Place votive candles in tall glass vessels, and attach a flower (dahlias are shown here)
you can get the vases at Dollar Tree, 3 bags of rocks and the floating candles in a 6 pack at Hob Lob. With a super gorgeous orchid as the flower, in the colors of the wedding, you've got yourself a very pretty, and very thrifty centerpiece!
A bud vase filled with water, a wide flower (real or silk), and a small tealight. This looks like spring or country-simple, but you can do whatever flower you want (and tealight) as long as it creates a wide enough base for the candle.