It's done amazingly well in my garden. The bees love it. The butterflies love it. The goldfinches love it. Ron loves it.
Unfortunately, I kind of hate it.
The plant's common name is "Verbena on a Stick," which gives you a good idea of its habit. Garden designers say it's airy and architectural. I say it's spindly and weak. Mine are nearly 6 feet tall, and since the stems at the flower heads are particularly thin, a good rainfall - or a half-ounce goldfinch - can easily bend them. By September the plant is a mess.
Gardeners are one tough crowd to please.