Hi, from looking at the flowers, I'm guessing this might be Verbena hastata, but it is just a guess. Hopefully someone can confirm the variety.

I agree; V hastata I have these in pink and white too.

Thanks both. I had it in my mind that hastata was a short variety. This has been in 2 years and is between 5 and 6 feet tall.

Mine is about 4ft but if happy and well fed it will grow taller.

Thanks.