# Topsoil vs Garden Soil vs Fill Dirt What each soil product is, where each one belongs, how to check a load before you buy, and how much to order. Guide page: (published 2026-10-06, updated 2026-10-06). This Markdown version has the guide's key points, outline, FAQs and sources; the full article, with its worked examples and diagrams, is on the page. ## Key takeaways - Topsoil is the dark surface layer of soil (the A horizon), fill dirt is excavated soil of variable quality used to fill holes and raise grade, and garden soil is a bagged blend made to be mixed into the soil you already have. - None of them is a regulated grade: New Hampshire has no legal definition of topsoil and Connecticut no grading system, so ask where a load came from, whether it was screened, and for test results. - Use fill to fill holes and raise the grade, then cap it with topsoil: Penn State Extension calls for a minimum of 4 to 6 inches of good topsoil, measured settled, under a new lawn. - For raised beds, UMN Extension suggests around 2/3 to 1/2 topsoil with 1/2 to 1/3 plant-based compost; Miracle-Gro's in-ground garden soil is spread 2–3 inches deep and mixed into the top 6–8 inches of native soil. - Loose soil settles and the lawn depth is a settled depth, so order more than the finished volume and ask the supplier how much their product settles. ## In this guide 1. [The short answer](https://www.howmanyyardsdoineed.com/guides/topsoil-vs-garden-soil-vs-fill-dirt/#the-short-answer) 2. [What topsoil is](https://www.howmanyyardsdoineed.com/guides/topsoil-vs-garden-soil-vs-fill-dirt/#what-topsoil-is) 3. [What garden soil is](https://www.howmanyyardsdoineed.com/guides/topsoil-vs-garden-soil-vs-fill-dirt/#what-garden-soil-is) 4. [What fill dirt is](https://www.howmanyyardsdoineed.com/guides/topsoil-vs-garden-soil-vs-fill-dirt/#what-fill-dirt-is) 5. [Which one to use where](https://www.howmanyyardsdoineed.com/guides/topsoil-vs-garden-soil-vs-fill-dirt/#which-one-to-use) 6. [Checking quality before you buy](https://www.howmanyyardsdoineed.com/guides/topsoil-vs-garden-soil-vs-fill-dirt/#checking-quality) 7. [Settling and how much to order](https://www.howmanyyardsdoineed.com/guides/topsoil-vs-garden-soil-vs-fill-dirt/#settling-and-ordering) 8. [Worked examples](https://www.howmanyyardsdoineed.com/guides/topsoil-vs-garden-soil-vs-fill-dirt/#worked-examples) ## Frequently asked questions ### Can you plant directly in fill dirt? Not well. Fill is soil excavated somewhere else, and UF/IFAS Extension notes it can vary widely in its physical and chemical properties. UConn Extension says material sold for grading can be fine for filling low spots but is a poor choice for a vegetable bed, so cover fill with topsoil before you plant. ### Is garden soil the same as topsoil? No. Topsoil is soil; garden soil is a blended product for improving the soil you have. Miracle-Gro labels its Garden Soil All Purpose for in-ground use, spread 2–3 inches deep and mixed into the top 6–8 inches of native soil, and advises against planting directly into it. ### What should I fill a raised bed with? UMN Extension recommends around 2/3 to 1/2 topsoil and 1/2 to 1/3 plant-based compost, with a loam or sandy loam topsoil. It says potting soil dries out too quickly for raised beds, and UConn Extension says a topsoil-compost blend works better than straight compost or straight mineral soil. ### How much topsoil should go over fill for a new lawn? Penn State Extension says a minimum of 4 to 6 inches of good-quality topsoil, measured firmed or settled. At 6 inches, a 30 × 20 ft lawn takes 11.1 cubic yards before any allowance, and loose soil settles, so order more than that. ### How can I tell if topsoil is good before I buy it? Not by looking: UNH Extension says quality can't be judged from the pile. Ask for test results or test a sample. UNH calls pH 5.5 to 7.5 acceptable with loam or sandy loam best, and Utah State rates organic matter under 1.0% or coarse fragments over 5.0% as unacceptable. ## Related calculators and guides ### Calculators - [Topsoil Calculator](https://www.howmanyyardsdoineed.com/topsoil-calculator/) — Topsoil volume in cubic yards and meters for lawns, beds, and fill, with an optional weight from your supplier's density. - [Mulch Calculator](https://www.howmanyyardsdoineed.com/mulch-calculator/) — Mulch volume in cubic yards for any bed, plus a whole-bag count for the bag size you are buying. ### Guides - [How to mulch garden beds: depth, timing, and types](https://www.howmanyyardsdoineed.com/guides/how-to-mulch-garden-beds/) — Extension-backed mulch depths, timing, materials, and tree-ring technique, with a worked example for buying bags. - [What Is a Cubic Yard?](https://www.howmanyyardsdoineed.com/guides/cubic-yards-explained/) — What a cubic yard is, how to convert area × depth into yards, and how much ground one yard covers. - [Bagged vs. Bulk Materials: Which Should You Buy?](https://www.howmanyyardsdoineed.com/guides/bagged-vs-bulk-materials/) — How to compare bags and bulk delivery using bags per cubic yard and your own local prices. - [How to Plan a Bulk Material Delivery](https://www.howmanyyardsdoineed.com/guides/planning-material-delivery/) — Rounding to supplier increments, questions to ask, and a checklist before bulk material arrives. ## Sources - [Topsoil Quality Guidelines for Landscaping](https://extension.usu.edu/yardandgarden/research/topsoil-quality-guidelines-for-landscaping.pdf) — Utah State University Extension. Used for: Topsoil = the A horizon only; Utah topsoil layers 2–10 in thick; ideal pH 5.5–7.5; unacceptable: organic matter \< 1.0%, coarse fragments (> 2 mm) > 5.0%; no fragments larger than 1 1/2 in. Checked 2026-10-06. - [Purchasing Top Soil \[fact sheet\]](https://extension.unh.edu/resource/purchasing-top-soil-fact-sheet) — UNH Cooperative Extension. Used for: Acceptable pH 5.5–7.5; loam or sandy loam texture best. Checked 2026-10-06. - [What to Know Before You Buy Topsoil](https://homegarden.cahnr.uconn.edu/2026/05/17/topsoil/) — UConn Home Garden Education Office. Checked 2026-10-06. - [Lawn Establishment](https://extension.psu.edu/lawn-establishment) — Penn State Extension. Used for: Minimum 4–6 in of good-quality topsoil, firmed or settled depth; ideally 2 in of it mixed into the upper 2–3 in of subsoil. Checked 2026-10-06. - [Raised bed gardens](https://extension.umn.edu/garden-and-home/yard-and-garden/gardening-in-minnesota/raised-bed-gardens) — University of Minnesota Extension. Used for: Around 2/3 to 1/2 topsoil and 1/2 to 1/3 plant-based compost. Checked 2026-10-06. - [Soils and Fertilizers for Master Gardeners: Urban Soils and Their Management Issues (SL276/MG456)](https://ask.ifas.ufl.edu/publication/MG456) — UF/IFAS Extension. Checked 2026-10-06. - [Refreshing raised bed soil generates exceptional results](https://extension.illinois.edu/news-releases/refreshing-raised-bed-soil-generates-exceptional-results) — University of Illinois Extension. Checked 2026-10-06. - [Miracle-Gro Garden Soil All Purpose product page](https://scottsmiraclegro.com/en-us/brands/miracle-gro/products/raised-bed-in-ground-soils/miracle-gro-garden-soil-all-purpose/75052430.html) — The Scotts Company. Used for: Spread 2–3 in and mix into the top 6–8 in of native soil; two 2 cu ft bags cover 24 sq ft at 2 in, three at 3 in. Checked 2026-10-06. **Estimate only.** Results are planning estimates computed from the numbers you enter. They are not engineering, structural, or code advice. Confirm quantities, product yields, and installation requirements with your supplier, the product label, and your local building authority before you order or build.