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Landscaping Supplies

Soil, gravel and retaining wall materials are landscaping supplies for different site conditions. The right choice depends on drainage, soil and grade.

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Landscaping

Landscaping Supplies

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Learn about Landscaping Supplies

Quantities for landscaping supplies depend on the planned ground levels and the depth of each material layer. Soil in a planting bed needs to accommodate the rooting depth of the intended plants, while a gravel walkway needs room for its base beneath the finished surface. Setting those levels on the plan helps keep added material below door thresholds and clear of foundation drainage openings.

Landscaping Supplies

Bulk soil and gravel in the United States are commonly sold by the cubic yard, though some suppliers quote aggregate by weight. Confirm the unit before comparing quantities; a ton cannot be converted to a volume without knowing the material’s bulk density. Retaining wall materials need a different calculation, based on the wall system’s dimensions and layout. Corners and changes in height can require specific components, so a face-area estimate alone may not cover the complete assembly.

How do I calculate the volume of soil or gravel?

Multiply the area in square feet by the material depth in feet, then divide by 27 to calculate cubic yards. Confirm with the contractor how much additional material is needed to allow for compaction or settling.

What should I check before choosing soil for planting?

Ask for available soil test results, including pH, and compare them with the growing requirements of the intended plants. Food-growing beds may also warrant testing for contaminants.

Does a retaining wall need an engineered design?

Check local permit and engineering requirements before selecting wall materials. Slopes or loads above the wall, such as a driveway, can affect the design requirements even for a relatively low wall.