Choose an area in the yard that receives full sun, as the plant will not do well in shaded areas. Leave an adequate amount of space around the plant, as it will spread quickly. Pampas grass grows best in sandy and loamy soils.
Dig the planting hole 12 inches to 18 inches deep and 15 inches wide to accommodate plants grown in gallon containers. The crown of the plant should be at ground level when set into the planting hole. Prepare the soil well, working in organic compost or peat moss to assure proper drainage.
Soak the plant thoroughly with water before removing it from the container. This plant tends to have roots that are tough and become interwoven in containers. Cut through the roots with a garden trowel to spread the roots outward on all sides.
Place the plant into the planting hole, spreading the roots outward. Keep the plant straight, with its most attractive side facing outward.
Water the plant thoroughly and fill in around the plant with soil. Tamp the soil firmly around the plant. Water the plant and cover the area around it with mulch. Water the Pampas grass regularly for the first few weeks. Water the plant during dry times of the year.