I love this for cut flowers, easy to grow and it produces plenty for cutting in a short time. It is a bit invasive but I keep it in check by just pulling in early spring where I don't want it to go. It's elegant in cut flower arrangements.
It blooms July through September, 24-36" high with a 4' spread, requires sun to partial shade, average to moist, well drained soil, 4-6" flower head. Good in zones 3-8