Topsoil and Compost for Landscaping Projects

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Topsoil, compost and garden soil are often used for similar projects, but they are not always the same thing. Each one has a different role, and choosing the wrong material can affect drainage, plant growth and the final finish. In this guide, we’ll look at when to use topsoil, when compost is the better option and what contractors, landscapers and tradespeople should consider before buying.

What is the difference between topsoil and compost?

Topsoil is the upper layer of soil used to create or improve growing areas. It is commonly used for lawns, borders, beds and general landscaping work. Good quality topsoil should provide a suitable base for grass, plants and shrubs to establish.

Compost is different. It is usually richer in organic matter and is often used to improve soil structure, add nutrients and support plant growth. Bags of compost are commonly used for planting, containers, raised beds and soil improvement.

In simple terms, topsoil is usually used to build up or level an area, while compost is used to improve the soil or help plants grow.

When should you use topsoil?

Topsoil is a practical choice for larger landscaping jobs where you need to create a growing layer or improve the surface of an outdoor space. It can be used across domestic gardens, commercial landscapes and general groundworks where planting or turfing is part of the project.

Common uses for topsoil include:

• Create new lawns 

• Laying turf

• Levelling uneven garden areas 

• Filling raised beds

• Improving poor existing soil

• Building up borders and planting areas

• General landscaping and garden preparation

Garden topsoil is often used where the existing ground is too compacted, shallow, stony or poor quality to support healthy growth. It can help create a more suitable surface for turf, seeding and planting.

When should you use compost?

Compost is usually used when the aim is to improve the quality of the soil rather than build up the ground level. It can help add organic matter, improve moisture retention and support root growth.

Bagged compost is useful for smaller jobs, planting schemes and areas where a cleaner, easy-to-handle product is needed. It is also practical for customers working on garden improvements, containers or raised beds.

Common uses for compost include: 

• Planting flowers, shrubs and vegetables

• Improving beds and borders 

• Filling pots and containers 

• Mixing into poor garden soil

• Supporting raised bed planting 

• Improving soil structure before planting 

For landscaping projects, compost can be worked into existing soil to help improve the growing conditions. However, it is usually not used on its own for levelling large areas or creating a full lawn base.

What is garden soil used for?

Garden soil is a broad term and can refer to soil used for beds, borders, lawns and general planting areas. In many cases, garden soil may include a mix of topsoil and organic matter, depending on the product.

For trade buyers, it is worth checking the product description carefully. Some garden soil products may be better suited to planting, while others may be designed for general landscaping. The right choice will depend on whether the job needs structure, nutrients, drainage or volume.

If the project involves laying turf or building up ground levels, topsoil is usually the main material to consider. If the project is focused on improving beds, borders or planting areas, compost or a soil improver may be more suitable.

Bulk bag topsoil vs bagged compost

The size of the job will often decide whether bulk bags or smaller bags are the better choice.

Bulk bag topsoil is useful for larger landscaping projects because it provides a higher volume of material in one delivery. It can be a good option for turfing, levelling, raised beds and bigger garden preparation jobs.

Bagged compost is easier to move around the site and can be more convenient for smaller tasks. It is often a better fit for planting, containers, border work and jobs where only a limited amount is needed.

When to choose bulk bag topsoil

Bulk bag topsoil can be the better option when:

• You are covering a larger area

• You need to level or build up ground 

• You are preparing for turf or seed 

• You want fewer individual bags to handle 

• Delivery access is suitable for bulk bags

For contractors and landscapers, bulk bags can help reduce packaging and make it easier to order enough material for larger jobs.

When to choose bagged compost

Bagged compost can be the better option when:

• The job is smaller or more detailed

• You are working in borders, pots or raised beds

• Access is limited

• Material need to be moved by hand

• You want a cleaner option for customer-facing garden work

Bags of compost can also be easier to store and use in stages, which can be helpful on jobs where planting is completed over more than one visit.

How much topsoil or compost do you need?

The amount of topsoil or compost needed will depend on the area size and the depth required. For topsoil, contractors should measure the length and width of the area, then allow for the required depth.

A shallow layer may be enough for light soil improvement, while turfing, levelling or raised beds may need a deeper layer. It is also worth allowing a small amount extra for settlement, uneven areas or wastage.

For compost, the quantity depends on how it is being used. Mixing compost into existing soil will usually require less material than filling containers or raised beds.

Before ordering, check:

• The total area to be covered

• The depth needed

• Whether the material is spread, mixed or used to fill

• Site access for delivery

• Whether bulk bags or smaller bags are easier to handle 

• Any wastage or settlement allowance 

Getting the quantity right helps avoid delays, extra delivery costs and leftover material on site.

What should you check before buying topsoil or compost?

Not all soil products are suited to the same job, so it is worth checking the specification before ordering. This is especially important for trade projects where the finish needs to meet customer expectations.

Things to consider include:

• Whether the product is suitable for lawns, beds or planting

• The texture and drainage properties

• Whether it is screened or blended

• The organic matter content

• How easy it will be to spread or work into the ground

• Whether the site has access for bulk delivery

• How much material needs to be moved by hand

For landscaping work, the condition of the existing ground also matters. Compacted soil, poor drainage, rubble, weeds or old turf may need to be dealt with before new topsoil or compost is added.

Preparing the area before adding topsoil or compost

Good preparation can make the finished result look better and last longer. Before adding new material, the area should be cleared of large stones, weeds, roots and debris. If the ground is compacted, it may need to be loosened to help drainage and root growth.

For topsoil, the surface should be roughly levelled before the material is spread. Once added, the topsoil can be raked out to create an even finish.

For compost, the material is often worked into the existing soil rather than left as a separate layer. This helps improve the structure and supports better growing conditions.

Common mistakes to avoid

Choosing the right material is important, but so is using it correctly. Common mistakes can affect plant growth, drainage and the final appearance of the project.

Mistakes to avoid include:

• Using compost instead of topsoil to build up large areas

• Ordering too little material

• Spreading topsoil over compacted or unprepared ground

• Not checking whether the product suits turfing or planting

• Ignoring drainage issues before adding new soil

• Leaving weeds or debris in the area

• Using poor-quality existing soil without improvement

• Not allowing for settlement on deeper areas

Taking time to prepare the ground and choose the right material can help reduce problems later.

Which should you choose for your project?

For levelling, turfing, lawn preparation and larger landscaping areas, topsoil is usually the best choice. It provides the growing layer needed for grass, plants and general garden use.

For planting, soil improvement, containers and raised beds, compost is often more suitable. It can help improve structure and add organic matter where plants need extra support.

For many landscaping projects, the best approach may be to use both. Topsoil can create the main growing layer, while compost can be mixed into beds and borders to improve the soil before planting.

Topsoil and compost FAQs

Is topsoil the same as compost?

No, topsoil and compost are different. Topsoil is mainly used to create or improve a growing layer, while compost is used to improve soil quality and support planting.

Can you use compost instead of topsoil?

Compost is not usually the best choice for levelling large areas or creating a lawn base. It is better used for planting, containers and improving existing soil.

What is bulk bag topsoil best for?

Bulk bag topsoil is useful for larger landscaping jobs, including turfing, levelling, raised beds and general garden preparation.

Are bags of compost better for small jobs?

Yes, bagged compost is often more convenient for smaller jobs, planting, containers and areas where material needs to be moved by hand.

Can topsoil and compost be mixed together?

Yes, topsoil and compost can be used together in many garden projects. Compost can be mixed into topsoil or existing garden soil to improve structure and support plant growth.

Final thoughts

Topsoil and compost both play an important role in landscaping projects, but they are used for different purposes. Topsoil is usually the right choice for building up, levelling and preparing growing areas, while compost is better suited to planting and soil improvement.

By choosing the right material, ordering the right quantity and preparing the area properly, contractors and landscapers can create a better finish and give lawns, beds and borders the best chance to establish.

Explore our range of topsoil and compost to find the right products for your next landscaping project.