The addition of lattice to the sides of a pergola allows for climbing plants and vines to grow up the sides, creating a natural sun and wind screen. Lattice is made of crisscrossed strips of wood that create a growing surface for climbing plants and vines such as roses, clematis and morning glory. Plant the vines at the base of the wall of the pergola and they'll grow upwards, eventually covering the lattice walls. This adds not only attractive, fragrant flowers to the relaxing area but also a soft screen from the elements.
Adding lighting to a pergola instantly creates a nighttime retreat in the backyard. Different lighting options will create different feels to the area; choose the one that you find most aesthetically pleasing. In France, it's common to see pergolas decorated with string lighting strewn across the roof the pergola, creating a softly lit ceiling. Another option is solar-powered lights installed on the corners of the pergola, and these require no wiring. Lighting can be purchased from specialty websites and local hardware stores.
The addition of a patio dining table to your pergola will create a luxurious dining area. A grill or fire pit can also be added beneath or near the pergola to create an area in which to prepare the food. Choose patio furniture that matches the décor of the pergola to tie the design together. Another option is to place a fire pit in the center of the pergola and position patio chairs around the fire pit to form a gathering area for family and friends.