Gap Graded Structural Soil

Gap Graded Structural Soil is formulated for use in areas where trees are planted within or near sidewalks, streets and driveways. This mix consists of a sized rock, clay loam, and a soil aggregating polymer (P.A.M.). This combination allows architects and engineers to achieve the proper compaction for placing concrete or asphalt over the planted surface, while still providing proper pore space for root development. Using this Gap Graded Structural Soil will allow potentially invasive roots to grow within the oversized planting pit without causing structural damage to the solid surfaces above.

PLANTING RECOMMENDATIONS:
Dig oversized plant pit at least twice the container size. Install soil mix in lifts. Each lift must be compacted by a non-vibratory roller. Scarify the top 2 inches of each lift after compaction and prior to placing the subsequent lift.

INGREDIENTS:
Clay loam topsoil, sized rock and P.A.M.

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