How to topdress your lawn

Start by mowing your lawn to a short height to make the process easier. Cutting the grass short makes it easier for the topdressing to reach the soil surface rather than getting caught in long blades of grass. This helps the nutrients and soil amendments in the top dressing integrate effectively with the existing soil. Additionally, mowing exposes uneven areas of the lawn, such as dips or hollows, so you can better identify where more top dressing might be needed to level the surface.

Next, aerate the lawn using a lawn aerator or garden fork. This creates small holes that improve drainage and allow the topdressing to settle into the soil structure. Preparing your lawn in this way ensures the nutrients and moisture from the top dressing can reach the grass roots effectively.

Choosing the right topdressing mix depends on your soil type. For sandy soils, an organic compost mix will help retain moisture. If you have clay soils, a top dressing with sand is ideal for improving drainage. For loamy soils, a balanced mix of soil, sand, and organic matter works best to maintain good soil health. Pre-mixed topdressing blends are available, or you can create your own by combining organic materials like compost with sand or soil.

Spread an even layer of the topdressing mix across your lawn using a shovel. The layer should be about 1–2 centimetres deep, just enough to cover the soil without burying the grass blades. Once the top dressing soil is spread, use a soil spreader or the back of a rake to work the mix into the soil. This helps it settle evenly and ensures it reaches the grass roots.

After spreading the topdressing, water your lawn thoroughly. This helps the material settle into the soil and begins the nutrient absorption process. A good soak also ensures the grass roots can access the moisture and nutrients provided by the topdressing.

Topdressing isn’t usually needed for new lawns in the first few months. However, once the lawn is established, you can use a light mix to fill in any low spots. It’s also a good idea to fertilise a few weeks before top dressing to maximise growth. To maintain a level and healthy lawn, repeat the top dressing process once a year or as needed.

Learn about how to fertilise your lawn.