If you’re filling in low spots, leveling a yard, or building up depth before laying new sod, you need topsoil. If your existing soil is compacted, sandy, or nutrient-poor and you’re trying to improve plant and lawn health, you need compost. Most Highland, Utah yards — sitting on the clay-heavy bench soil common along the Wasatch foothills — actually benefit from both: topsoil to build the base, and compost mixed in to fix the structure and feed what’s growing in it. Ordering the wrong one is the single most common mistake Highland homeowners make when they call in a bulk delivery for the first time.
The confusion is understandable — both look like “dirt” on a delivery truck, and product listings don’t always explain the difference clearly. But topsoil and compost solve two different problems, and using one where you need the other either wastes money or leaves your project underperforming. Here’s exactly how to tell which one your Highland property needs, and how much of it to order.
Topsoil is mineral soil — a blend of sand, silt, and clay with a small amount of organic matter — that provides structure and bulk. It’s what you use to fill, level, and build up ground. Compost is fully decomposed organic matter — food scraps, yard waste, or manure broken down into a rich, dark, crumbly material. It’s not really “soil” at all; it’s a soil amendment used in smaller quantities to feed and restructure the soil that’s already there.
Neither one is a substitute for the other. Topsoil alone doesn’t fix compacted or lifeless soil, and compost alone won’t fill a low spot or give you the depth needed under new sod.
Highland sits higher on the bench against the base of the Wasatch Range, and a lot of properties here — especially newer builds on the east side near Alpine and Cedar Hills — sit on dense, clay-heavy native soil left over from grading during construction. That native soil compacts easily, drains poorly, and holds very little organic matter, which is exactly why a straight load of topsoil dumped on top of it often doesn’t perform the way homeowners expect: the new topsoil sits on top of compacted clay that water still can’t get through. Working compost into the existing soil, or blending it with new topsoil before spreading, is what actually breaks up that structure and lets air, water, and roots move through it.
Reach for straight topsoil when your project is primarily about volume, depth, or grading:
For sod installation specifically, most Highland lawns need 4 to 6 inches of quality topsoil as a base layer before the sod goes down — thinner than that, and the new grass struggles to root into the compacted native clay underneath.
Reach for compost when the problem is soil quality, not soil quantity:
Compost is typically worked into the top 2 to 4 inches of existing soil, or blended at roughly 1 part compost to 3 parts topsoil when building a new bed from scratch — enough to change the soil’s structure without overwhelming it with organic matter.
Use this table to match your Highland project to the right product:
| Factor | Topsoil | Compost |
| What it is | Mineral soil blend (sand, silt, clay) | Fully decomposed organic matter |
| Best for | Filling, leveling, building depth | Feeding soil, improving structure |
| Typical use case | New sod base, grading, raised beds | Thin lawns, garden beds, clay soil fix |
| Application depth | 4–6 inches for new sod base | 2–4 inches worked into existing soil |
| Nutrient content | Low to moderate | High |
| Fixes clay compaction? | No, on its own | Yes, over time |
| Highland bench soil | Needed for volume/leveling | Needed to fix underlying clay |
Bulk soil and compost are sold by the cubic yard, and the amount you need depends on the square footage and the depth you’re applying:
It’s almost always better to order slightly more than your calculation than to run short mid-project — a second delivery costs more in time and delivery fees than a little extra material sitting in a corner of the yard.
Yes — and for most Highland projects starting from bare, clay-heavy native soil, blending the two is the better approach rather than choosing one or the other. A common ratio for new beds or lawn renovation is roughly 3 parts topsoil to 1 part compost, giving you the volume and structure of topsoil with the nutrient and drainage benefits of compost mixed directly in, rather than layering compost only on the surface where it’s slower to reach the root zone.
Not sure which product — or how much of it — your Highland project actually needs? DIY Landscape Supply will help you calculate the right quantity and recommend topsoil, compost, or a blend based on your specific yard and project.
Call DIY Landscape Supply today at (385) 321-3341 or order online, and get bulk topsoil and compost delivered directly to your Highland property.
Can I just use compost instead of topsoil for a new lawn?
No. Compost is too rich and too loose on its own to serve as a base layer for sod — it doesn’t hold structure well enough and can actually burn new roots if applied too thick. Use topsoil (or a topsoil-compost blend) as the base, and reserve straight compost for smaller-scale soil improvement.
How much topsoil do I need for a 2,000 square foot lawn in Highland?
At a standard 4-inch depth for new sod, a 2,000 square foot lawn needs approximately 25 cubic yards of topsoil. At 5 inches, plan on closer to 31 cubic yards. Ordering from a bulk supplier by the cubic yard is significantly more cost-effective than bagged soil at this scale.
Will compost fix my Highland yard’s clay soil problem?
Compost is the most effective single fix for clay-heavy Highland soil, but it works gradually rather than instantly. Working 2 to 4 inches of compost into the top layer of soil once or twice a year measurably improves drainage and root health over one to two growing seasons.
Do I need topsoil or compost for a vegetable garden bed?
Both, typically blended. Start with topsoil for the base volume and mix in compost at roughly a 3:1 ratio for the nutrient content vegetables need. An all-compost bed drains too fast and can be too rich for young seedlings.
How soon can I plant after adding topsoil or compost?
Topsoil can typically be planted or sodded immediately once it’s leveled and lightly compacted. Fresh compost that hasn’t fully cured should ideally rest for a week or two before planting directly into it, though it can be worked into existing soil right away.
Does DIY Landscape Supply deliver both topsoil and compost to Highland, UT?
Yes. DIY Landscape Supply delivers screened topsoil, compost, and blended soil products directly to Highland properties, with bulk pricing by the cubic yard and delivery scheduling to fit your project timeline.