This landscape detail shows a three-foot total soil depth profile consisting of a two-inch layer of mulch over a six-inch layer of topsoil, resting upon twenty-four inches of horticultural subsoil. The transition zones between the subsoil and adjacent layers feature scarified surfaces to promote bonding and root penetration. The entire soil assembly bears upon an undisturbed or compacted subgrade at the base.
3'-0" Topsoil Horticultural Subsoil 2" 6" Finished Grade Mulch Scarify Surface at Transition Zone Scarify Surface at Transition Zone Undisturbed or Compacted Subgrade 24"
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