One of my favorite fall garden plants is the showy Clematis paniculata(C. terniflora). Not only does this beauty cover my old fence boards with hundreds of star shaped white blossoms, it also fills the late summer air with a sweet fragrance.
Tips on growing clematis--did you know they can't climb wooden trellises? They don't twine; they wrap, so any support thicker than 1/2 inch won't work. Use twine or trellis netting to give the illusion of climbing on your wooden trellis.