Depending on your climate and the plants you choose, windowboxes can be changed out seasonally. In New England, pansies can survive in the springtime, a wide range of perennials and annuals work in the summer, and by fall you can add cabbages and mums. By the way, do you think the cut-outs on the shutters are trees or some sort of broccoli? Let me know what you think they are in the comments section.