Since they were spent for the season, I decided to replace them with evergreen cuttings. I filled a similar flower box on my back patio too. And it just happened to snow on them the next day, making for a very pretty sight!
I can see this box from my kitchen window and sliding glass door. It adds a nice bit of greenery to my view in the bleakness of winter.
I filled another container with some of the longer and varied pieces of evergreens and placed it in the corner. I think it looks quite lovely here.