Flower decoration has a lot of significance and use in a wedding like corsages that can be worn in a pin_on style, on the wrists or hand held where several small blooms are tied together.
You may start by placing your foliage that you will use in a water vase. You have to make sure that you keep it around the lips or edges. Stick with the plan to place them the lips or edges of your water vase with a layer of your Foliage. When it is too big or too thick, it ends up detracting from your cut flowers. And if it is small or too thin, visual contrast will not show.