Today, most trees and shrubs are grown in plastic containers with no root loss during transplant. The unintended consequence is that  the step of soil preparation is often overlooked. Plants are now "installed" in construction-damaged and compacted soils. Subsoils are mixed with topsoils and our landscapes are on "life-support." These landscapes require excessive irrigation and fertilizers for the plants to survive and years for the soil's microorganisms to recolonize the soil.
In TLC Services' maintenance programs we use high quality, slow release fertilizers and soil amendments to repair the subsoil and rebuild the topsoil. In both our renovation and new construction projects we cultivate the solid subsoil and add compost and commercially available live soil microorganisms to speed up the reconstruction of the topsoil, thereby giving landscapes a running start at a vibrant, healthy life.
Historically, trees and shrubs were grown in fields and when harvested, a substantial amount of the plant's root system was left in the field. Landscapers knew that for the plant to survive the transplant process, proper soil preparation was necessary.