Activity for Meggan

Hey does anyone know of a good place to get branches for centerpieces? they dont have to be too big, but i dont want the thin. Not concerned with the color either. thanks!

My colors are black and white, the ceremony is going to be on a large stage so i want to put two large pots on each side of the stage, the picture is similar. My mom suggested using ferns in them, but i dont want anything that green, a little green...