By definition, a garden pergola is a structure that is built out of pillars, cross beams, and lattice walls. The lattice walls support climbing vines that grow over the top of the structure. Much of the area beneath a garden pergola is therefore shaded, but the light is never completely blocked. Visibility remains clear for humans, and sufficient sunlight reaches the ground for most species of garden plants to thrive beneath the shelter created by the structure.
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