It looks very similar to the Italian Bella di Notte (4 o'clocks) in the link below, although these are said to be fragrant. If you move your mouse over the photo it expands for a better look. "Product Description Four O'Clocks - Bella di Notte. Pretty mix of bell-shaped flowers which open in the evening. Very fragrant. Two feet tall. Space 9". Direct seed or transplant. They begin to bloom in mid summer. You can dig the tuberous roots, store inside over the winter and plant outside the next year." Here is a link that might be useful: GrowItalian.com

Why don’t you try asking on the Name that Plant forum, where folks who love doing plant ID hang out. You will want to add your general location and if you know it, your USDA growing zone to help limit the possibilities. The green text is a direct link to that forum.

I think it is a Lilac, Syringa reticulata perhaps.

Because some like cestrum and clereodendron are actually hardy in z7 in the US. Wikipedia describes my location as humid subtropical. I can grow some lantana as die back perennials, crinums, sabal palm, etc. It's not like my z7 is Alaska or something ;0 I know it's not a verbena sp, but the foliage is reminscent of verbena and some things in verbena family, some of which are shrubs.