Middletown, Maryland Cherry blossoms get all the glory around here, but late summer brings beautiful florals, too. Find vibrant yellow, fuchsia, orange, and red petals at Summers Farm in Frederick County, where a flower festival takes place from August 22 through September 7 (weekends only, including Labor Day). The farm is around an hour drive from Washington. Take a wagon to the field of zinnias, sunflowers, cosmos, and wildflowers to pluck a …