Natural grasses are ideal for mound planting because their fibrous roots hold soil in place and provide year-round cover. Wildflowers and grasses are low maintenance and grow well in the dry soil on top of the mound. When working with vegetation on the mound, avoid tilling the soil too much and always wear gloves. Do not plan on fertilizing and irrigating the area. The mound should have little or no traffic in order to avoid compacting the soil.
Soil compaction prevents the airflow around the system and can also lead to erosion.
And you don't want to stake a dog out on the mound. The septic mound system is a necessary and valuable investment. The wrong type of vegetation can cause expensive damage. Careful landscape planning and proper plant selection can protect the mound from erosion and create a pleasing yard to satisfy any gardener.