Different plants need different types of microbial communities. Before any course of action is implemented, a SoilKeepers Yard Improvement Plan to specify what types of plants the property owner wants in what locations is needed.
Because plants can thrive in a wide variety of soil types, if healthy communities of soil microbes exist, the Soil Biology portion of a soils test is the most important.
Soils in Virginia have all the nutrients they need for plant growth. What is needed is a balanced community of bateria, fungi, and other microbes to make these available to plants.
Properly prepared compost is the best way to introduce the types of bacteria, fungus, and other soil microbes your plants need.