I think I see a sprinkler head on the left side of this bed. Does this entire bed get watered, or does the curb edge stay dry? I can't figure out why you stopped the planting so far back. The bed looks unfinished because it is.

HERE is a list of ground covers for Georgia. Look for those that prefer Sun or Sun, Pt. Sh. Then note how tall and wide they grow so they won't overpower the space. Of those you like, find out if they are evergreen. That way you can have green around the mailbox through the winter with flowers in the spring or summer. Pick no more than two types, but fill the bed. There will be some space between plants to begin with, but the bed will look better as it fills out.

If you wish, you can start with a low ground cover closer to the curb. Creeping Phlox or Verbena are fine choices. Keep the boxwood as it is evergreen. There is no one answer to what you plant, but I think you are tired of planting cool season annuals, then warm season annuals year after year.

Thank you so much. Mind shift! At first I thought about verbena homestead due to its long flowering period...but I wonder if that grows a bit too tall and fluffy for the box woods. It might engulf them. Perhaps the tight habit of creeping phlox would keep with the formal look of boxwoods?

I have a mailbox bed just like this. I’m in z5B, north Missouri.

The worst problem I have is neighborhood male dogs who think this is a fine spot on which to pee. I have tried a blue star juniper several times but those have been the biggest pee target, so I dug up the last one a couple of days ago. Oh, and ice melt salt during the winter. I assume that’s not a problem for you. 😁

That leaves my bed with an ornamental grass on one corner (not sure the name but it gets no more than 4’ tall) and four Veronica, Sunny Border Blue. The Veronicas love the hot sunny spot, produce lots of blue flowers, and don’t seem attractive to dogs.