I have a wall in front of my house that faces west, so it get the hot evening sun in zone 6. The wall goes on both sides of the front of the house and the steps separate the two. Probably around 12 ft long and 2 feet wide. I have always had phlox out there and it is usually beautiful, but not long enough. This year the plants look pretty worn, so I thought I may did them up after they are done blooming. Any suggestions what would look nice out there? Preferably a perenial, that would bloom longer into the summer.

Check out these, Shasta Daisy, Stella de oro daylilys or Coreopsis, other members will have more choices for you

Hello and welcome.

I might not be that experienced with plants quite yet, but I DO have some ideas for you.

Maybe a nice mix of bulb plants that come up every year, Like Daffodils or Tulips, Another plant that comes to mind for you is a plant called Digitalis purpurea, A VERY beautiful plant, in my opinion.

Hope this helps!

Jared

The challenge is most perennials have a limited bloom period.
Reblooming daylilies are good. Jared's idea of tucking bulbs between the perennials is another good way to have longer bloom. Tulips generally are not that long lived in flowerbeds, compared to daffodils.
Digitalis is tall and not the look you have here, and may be prone to fall over on the sidewalk or lawn.
Wave petunias would give this look but you would want to dress with mulch over winter while the bed is bare. When you consider the eventual dividing of perennials, planting annuals isn't that difficult.