Looking in the mirror
You might not have considered mirrors as an obvious element of outdoor decor, but the right mirror in the right place can create a sense of light and space in your backyard. If your yard is on the smaller side then this can be invaluable in helping you to make more of it.
Fix a long mirror to your fencing and mount a trellis over the top of it and you have the illusion that you’re looking through to more garden. Choose a vintage-style mirror and hang it from a tree, or from the sides of your pergola. It will reflect more light during the day and create ambiance as the evening draws on.