Lava Rock vs Topsoil
Side-by-side comparison of Lava Rock and Topsoil to help you choose the right gravel for your project.
Overview
Lava rock is a lightweight, porous volcanic stone commonly used in landscaping. Its rough texture helps retain moisture while allowing airflow to plant roots.
Nutrient-rich upper layer of soil, ideal for establishing lawns, gardens, and planting beds. Quality topsoil is dark, crumbly, and full of organic matter that supports plant growth. Screened topsoil has been filtered to remove rocks, roots, and debris.
Common Uses
Lava Rock
- ✓ Landscaping
- ✓ Garden beds
- ✓ Decorative ground cover
Topsoil
- ✓ Lawn seeding
- ✓ Garden beds
- ✓ Raised bed fill
- ✓ Landscape grading
- ✓ Sod installation
- ✓ Tree and shrub planting
Pros & Cons
Lava Rock
- + Very lightweight
- + Excellent moisture retention
- + Decorative appearance
- − Breaks down over time
- − Sharp edges
- − Can scatter easily
Topsoil
- + Rich in nutrients for plant growth
- + Creates ideal growing medium
- + Dark color absorbs warmth for earlier spring planting
- + Screened options are ready to use
- + Essential for any planting project
- − Settles significantly after delivery
- − Quality varies greatly between suppliers
- − Can contain weed seeds
- − Heavy when wet
- − Should never be used as structural fill
Cost Comparison
| Measure | Lava Rock | Topsoil |
|---|---|---|
| Per ton | $90 – $150 | $12 – $30 |
| Per cubic yard | $110 – $180 | $15 – $40 |
Sizes & Colors
Lava Rock
Typically 3/4"–1.5" sizes. Red or black.
Topsoil
Fine, crumbly soil texture when screened. Dark brown to black color indicates high organic content. "Screened" topsoil has been run through a 3/8" or 1/2" screen to remove debris. Blended topsoil may include compost for extra nutrients.
Published February 11, 2026
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