Difference Between Trellis and Arbors | Garden Feature Guide

A trellis is a flat or panel-like structure built to support climbing plants, while an arbor is a freestanding passageway feature, often arched, that incorporates trellis-like sides and may shelter a bench.

If you’ve ever stared at a vine-covered structure in a garden center and wondered what to call it, you’re not alone. The line between trellises and arbors blurs in casual conversation, but they serve very different jobs. One mainly holds plants; the other creates a doorway, transition, or shady nook you can walk through. Choosing the right one comes down to what you want the structure to do for your yard, not just how it looks.

What Is a Trellis?

A trellis is a flat or lightly framed structure, typically made from wood, metal, or PVC, designed to support, train, and display climbing plants. The University of Florida’s IFAS Extension describes it as a small freestanding or wall-attached frame with crossbars that vines grip as they climb. Fine Homebuilding calls it latticework built for plant support—either as a panel fixed to a building or standing alone in a yard.

Trellises are workhorses of vertical gardening. They give tomatoes, peas, cucumbers, and flowering vines a structure to climb, saving ground space and improving air circulation around the plants. They can also serve as privacy screens or wall decorations when not fully covered in foliage.

What Is an Arbor?

An arbor is a three-dimensional, freestanding garden structure that typically marks an entrance, frames a path, or creates a transition between outdoor spaces. UF/IFAS notes that a true arbor often includes a bench beneath it—a feature that sets it apart from a flat trellis. Fine Homebuilding explains that an arbor usually incorporates trellis-like latticework on its sides but adds an arched or tunnel-shaped top, forming a passageway you walk through.

Arbors lean toward the human side of landscaping. They’re designed to be walked under, sat beneath, or viewed as focal points. Vines trained over an arbor add shade and fragrance, but the structure itself is about creating a sense of arrival or enclosure, not just holding plants.

Key Differences at a Glance

Which Should You Choose?

Pick a trellis when your goal is strictly plant support—training vines up a wall, screening an unsightly fence section, or adding vertical interest to a patio. Trellises are simpler to install and easier to move if you change your mind.

Pick an arbor when you want to frame a gateway, transition between garden rooms, or create a destination with a bench. An arbor makes a stronger statement than a trellis, and its structure needs to be sturdy enough to handle mature vine weight plus wind load. Fine Gardening recommends securing freestanding arbors to the ground, especially in exposed areas.

If you’re ready to shop options for either structure, our tested roundup of garden trellises and arbors compares top-rated models by durability, size, and value.

FAQs

Can a trellis be used as an arbor?

Not really. A trellis lacks the three-dimensional, pass-through structure that defines an arbor. You can train vines over a trellis, but it won’t create the arched entryway or seating shelter that an arbor provides.

Is a pergola the same as an arbor?

No. Pergolas are larger overhead structures with posts and open rafters or beams, designed to shade seating areas or walkways. Arbors are smaller entry features, often arched, and typically built on a scale for gates or path transitions.

Do arbors need to be anchored to the ground?

Yes. Freestanding arbors should be secured with stakes, concrete footings, or ground anchors. Without proper anchoring, the weight of mature climbing plants and wind pressure can tip the structure over or shift it out of position.