If you’re starting a new lawn from scratch, one of the most important questions to ask is: How much topsoil do I need? Getting this right is critical to ensure your grass takes root and thrives for years to come.
At Kirk Allen Landscape Supply, we help homeowners, landscapers, and contractors across New Jersey with high-quality bulk topsoil and expert guidance. In this article, we’ll walk you through everything you need to know—from how topsoil impacts lawn health to how to calculate exactly how much you’ll need.
Why Topsoil Matters for a Healthy Lawn
Topsoil is the uppermost layer of soil—rich in nutrients, organic matter, and beneficial microorganisms. It’s where grass seeds germinate, roots develop, and water is retained. When laying down a new lawn, the quality and depth of the topsoil you use will directly affect:
- Seed germination
- Root establishment
- Drainage and water retention
- Long-term grass health and thickness
If your yard has poor native soil—clay, sand, or compacted fill dirt—adding fresh screened topsoil gives your new lawn the best possible foundation.
Recommended Topsoil Depth for a New Lawn
To grow healthy, resilient grass, the general recommendation is to lay 4 to 6 inches of topsoil across the entire planting area.
- 4 inches is considered the minimum for grass seed.
- 6 inches is ideal for sod or high-traffic areas.
This depth allows for adequate root growth and ensures moisture retention, even during dry spells.
How to Calculate How Much Topsoil You Need
To calculate the amount of topsoil required, you’ll need three measurements:
- Length of the area (in feet)
- Width of the area (in feet)
- Depth you want the topsoil to be (in inches)
Step-by-Step Formula:
(Length in feet) × (Width in feet) × (Depth in inches ÷ 12) ÷ 27 = Cubic Yards
Why divide by 12? Because we’re converting inches to feet.
Why divide by 27? Because 1 cubic yard = 27 cubic feet.
💡 Example Calculation:
Let’s say your new lawn area is:
- 50 feet long
- 30 feet wide
- You want 6 inches of topsoil
Calculation:
50 × 30 × (6 ÷ 12) ÷ 27
= 50 × 30 × 0.5 ÷ 27
= 750 ÷ 27
≈ 27.8 cubic yards
In this case, you’d round up and order 28 cubic yards of topsoil.
Bulk Topsoil Delivery in New Jersey
At Kirk Allen Landscape Supply, we offer high-quality screened topsoil available for pickup or bulk delivery throughout Hunterdon County, Sussex County, and surrounding areas in New Jersey.
We recommend scheduling delivery shortly before your project begins so the soil stays loose, fresh, and easy to spread.
✅ Screened for rocks and debris
✅ Locally sourced & nutrient-rich
✅ Fast, reliable delivery available
Pro Tips for Laying Topsoil
- Grade the area first: Ensure proper slope to direct water away from your home or structure.
- Remove debris: Rocks, roots, and existing weeds should be cleared before applying topsoil.
- Spread evenly: Use a rake or leveling tool to achieve uniform depth.
- Compact lightly: Use a roller or simply walk over the area to reduce air pockets before seeding or laying sod.
- Water thoroughly: Keep the soil moist to encourage seed germination and root growth.
Don’t Forget to Add Compost (Optional)
For even better results, consider mixing compost into your topsoil. This improves structure, fertility, and microbial activity—great for long-term lawn health. Our team at Kirk Allen Landscape Supply can help you choose the right blend.
Frequently Asked Questions
Can I use topsoil alone for a lawn?
Yes, but only if it’s quality screened topsoil. Avoid fill dirt, which lacks nutrients and may contain debris.
Should I add fertilizer on top of the topsoil?
Yes. Starter fertilizers can boost seed germination and early growth. Apply according to manufacturer guidelines.
How much does topsoil weigh?
One cubic yard of moist topsoil typically weighs around 2,000 to 2,400 pounds—keep that in mind when scheduling deliveries or planning for wheelbarrow use.
How much area does one yard of topsoil cover?
At 2 inches deep: ~162 square feet
At 4 inches deep: ~81 square feet
At 6 inches deep: ~54 square feet
Need Help Calculating or Ordering?
At Kirk Allen Landscape Supply, we’re not just a topsoil supplier—we’re your landscaping partner. If you’re unsure how much to order or need a recommendation for the best type of soil, give us a call. We’re happy to help!
📞 Call us at 973-347-3117
🌐 Order online or learn more
Final Thoughts
Topsoil may not be the flashiest part of a landscaping project, but it’s absolutely one of the most important. Investing in the right amount—and the right quality—sets your lawn up for long-term success.
So if you’re ready to transform your bare yard into a lush green space, let Kirk Allen Landscape Supply deliver the soil that makes it grow.
