I've got a patch of Veronica in a sunny border opposite our kitchen window.
My wife hates it.

It's far too straggly, sothers nearby plants and looks a mess. It does bloom
all summer long and has a fragrance of sorts.

What should I replace it with? I need something about 15 to 18 inches tall,
I'd quite like to have flowers all summer long and the blue / purple colour
looks fine. The replacement should be a bit better behaved and happy in
neutral / acid soil. There's plenty of shelter (we rarely get big frosts)
and the soild is reasonably moist all year.

Thanks


Mark