Want to add some height to your cottage garden? Consider including hollyhock (Alcea rosea), which blooms over a long period in summer. Depending on cultivar, its blooms come in singles and doubles in shades of lavender, pink, purple, red, salmon, apricot, white and yellow.
The fast-growing hollyhock can reach up to 8 feet in height, and its blooms also attract butterflies and hummingbirds. Hollyhock is a biennial or short-lived perennial but reseeds itself readily in the garden.