Understanding Soil Calculations
Soil is typically sold by the cubic yard for bulk delivery or by the bag for smaller projects. One cubic yard equals 27 cubic feet and covers approximately 162 square feet at 2 inches deep or 54 square feet at 6 inches deep.
Soil Coverage Chart
| Depth | Coverage per Cubic Yard | Best For |
|---|---|---|
| 1 inch | 324 sq ft | Overseeding, light topdressing |
| 2 inches | 162 sq ft | Lawn repair, mulching |
| 4 inches | 81 sq ft | Garden amendment, new lawn |
| 6 inches | 54 sq ft | Raised beds, deep gardens |
| 12 inches | 27 sq ft | Deep raised beds, planters |
Soil Types and Uses
| Soil Type | Best For | Avg Price/CY |
|---|---|---|
| Topsoil | Lawns, general landscaping | $25-45 |
| Garden Mix | Vegetable gardens, flowers | $35-55 |
| Compost | Soil amendment, mulching | $30-50 |
| Potting Mix | Containers, indoor plants | $50-80 |
| Fill Dirt | Grading, filling holes | $10-25 |
Raised Bed Soil Mix Recipe
For optimal raised bed growing, use this popular mix:
- 60% Topsoil: Provides structure and minerals
- 30% Compost: Adds nutrients and improves drainage
- 10% Perlite or Vermiculite: Improves aeration
Soil Buying Tips
- Bulk delivery is more economical for orders over 3 cubic yards
- One 40-lb bag covers approximately 0.75 cubic feet
- Add 10% extra for settling and compaction
- Screen soil for rocks and debris before use
- Test soil pH and amend as needed for your plants
- Wet soil weighs about 2,200 lbs per cubic yard
- Store unused soil covered to prevent weed seeds
When to Amend Soil
The best times to add soil or amendments are early spring before planting and fall after harvest. This allows time for nutrients to integrate and soil microbes to establish. Avoid working wet soil as it can compact and damage structure.