A trellis can be a simple frame with latticework panels.
Or it can be far more elaborate. This trellis combines lattice, fretwork and arches in a finished product that stands out even without plants covering it.
Placing a trellis against a wall gives climbing vines a structure to cling to, saving the wall from invasive roots that can weaken it.
When vines or other climbing plants are placed near a trellis, their spiraling tendrils automatically grab onto it. Freestanding trellises allow you to grow vertically even when a permanent structure isn't available.