We'd need a bit more info @debra_underwood - your conditions re soil and climate, rough location, and the aspect of the borders - how much sun/shade etc.
It's a place where beautiful isn't enough of a word....
I live in west central Scotland - not where that photo is...
When you've decided on your flowering plants, I'd recommend adding some ornamental grasses for structure and all season interest. They are generally disease and slug free, easy to care for and will enjoy the conditions in your sunny border. @B3's list looks good for your flowering plants!
Posts
I live in west central Scotland - not where that photo is...
"Have nothing in your garden that you don't know to be useful, or believe to be beautiful."
sunny all round garden at different times of day. Good - not clay.
Shrubby salvias verbena bonarensis
I'd add wallflower, but mine got demolished by slugs and snails.
"Have nothing in your garden that you don't know to be useful, or believe to be beautiful."