In the garden you know exactly what type of arbor is required, below. Arched, 3' deep, iron, creating an enfilade punctuated with an urn on plinth matching the one below.
Repetition, is one of your strongest design tools in the garden. Maximized with interior repetition.
Color & pattern, very easy to copy from this room into the garden.
I never tire of a client saying, "I love that." Exactly, I copied it from their interior. Yes, it's that simple.
Garden & Be Well, XO Tara
Pic via Cote de Texas. Why an iron arbor to match? Contrast. Yet, if the client wanted heavy cottage style I might do the wood.