subject: Garden arbors that accentuate external spaces [print this page] Plastic arbors and pergolas can be purchased in almost every color imaginable. When choosing a vinyl unit, be sure to look for a plastic that is treated with a UV inhibitor, so it won't fade or discolor over time. Vinyl is a good choice if you want your end product to be relatively maintenance free, because it won't need to be stained or painted. A vinyl arbor or pergola typically lends itself to a clean and modern design. White vinyl can be an especially attractive choice for an outdoor wedding in the spring or summer.