The industry long ago started calling certain types of soils that amend native soil "Garden Soil" because the formulation was specifically designed to be mixed with the native soil found in gardens that produce edibles, flowers, even shrubs, and trees. When mixed with the native soil found in your garden, the larger particle size found in Garden Soils provide a better balance between water retentions and drainage, create pockets in the soil allowing air and water to reach deeper into the soil, and provide nutrients for beneficial soil microbial activity, which help plants become more pest and disease resistant.
Garden Soils were never designed to be used as a stand-alone product to grow plants, but always to be mixed with native "garden soil." One of the primary ingredients in our garden soils is wood. We choose wood for a number of reasons.