One of my favorite blending plants. It's great as a cut flower, doesn't push perennials out, fills in where needed, and comes back reliably- even in zone
Best Planting Combination Ideas For Beautiful Garden
Achillea Gold Plate and Verbena bonariensis in late summer border. September yellow violet lilac - My Garden
Verbena bonariensis Lollipop Hardy perennial with floaty, purple flowers from July to October.
Buy Verbena bonariensis from Sarah Raven: Verbena bonariensis is a tall and elegant summer-flowering plant which will add stature and structure to your cutting patch or border.