The single Hollyhock is the classic cottage garden plant. Colors are red, rose, pink, and white. Wonderful against a fence, a wall, or in the corner of a garden, it can grow to 9 feet. Full sun is a must in the foggier parts of the country.
An All American Selection award winner, Summer Carinival is a great pick for adding height to a garden. Five foot tall stalks are covered in large, fully double, peony-type flowers ranging in color from rose, pink, red, white, and yellow.