Trellises are simple structures designed to allow climbing plants to grow vertically. They are typically rectangular in shape and vertical in orientation, made from a variety of materials including copper, wood, nylon netting and wire.
Arbors are a larger, more ornate versions of a trellis, with either arched or flat roof slats. They are characterized by a simple form, and often act as a focal point of a path or garden. Arbors are most commonly made from wood.
Pergolas are usually larger than arbors and are commonly used as an extension to a building. A more permanent architectural structure, they feature heavy beam construction, horizontal roof structure, and larger monolithic designs. They are great for creating a bridge between your home and garden, creating partially shaded outdoor living spaces.