Just giving your zone doesn't tell us anything about what your climate is like, except how cold it gets in your average winter. Zone 6a could be in the high desert of Utah, or in Maine or New York or Oregon. Very different conditions as to humidity, summer heat, soil and other factors. Please complete your personal profile and that way your city and state or country will appear in the upper right of your posts.
That does look like some type of perennial daisy to me. Very pretty!
