Is your lawn looking tired and struggling with weeds and disease? Topdressing could be the solution to revitalise your garden and make it the envy of the neighbourhood.

Topdressing involves applying a thin layer of organic material over your lawn to improve the soil quality. This method rejuvenates your lawn without needing to remove and replace the grass entirely. As the grass grows through the topdressing, the organic material integrates with the soil, adding essential nutrients and enhancing soil structure.

What Topdressing Materials Can You Use?

There are three primary materials for topdressing:

  • Sand: Commonly used on sports surfaces and golf courses to keep the surface firm and improve ball performance. Sand also aids drainage.
  • Topsoil: Helps to smooth out the ground and improve soil structure.
  • Compost: Suitable for all soil types, adding organic matter and nutrients.

Many people opt for a combination of these materials, and pre-mixed options are available for convenience. It’s best to use a topdressing material similar to your existing soil to ensure effectiveness and maintain air, nutrient and water movement. To determine your soil type, take a handful of damp soil from your garden and feel its texture.

How Much Topdressing Do You Need?

The amount of topdressing required depends on the size and condition of your lawn. As a general rule, use approximately 0.5 to 1 cubic metre of topdressing for every 100 square metres of lawn.

How to Apply Topdressing to Your Lawn

Topdressing can be time-consuming but is not overly complex. The most challenging part is preparing the lawn. Begin by aerating and scarifying the lawn to break up the thatch layer and alleviate soil compaction. This preparation allows the topdressing to penetrate deeper into the sward.

You can hire equipment for aerating and scarifying or hire a professional if your budget allows.

Once prepared, load your wheelbarrow with the topdressing mixture. Distribute it evenly across the lawn by starting at one end and placing small piles at regular intervals. Use the back of a rake to spread the topdressing smoothly. Take your time to avoid creating a bumpy surface. After spreading, use a stiff brush to work the topdressing into the dips, creating an even surface.

After applying the topdressing, water the lawn daily during dry spells. Wait until the grass grows to about 2-3 inches before mowing to help it recover.

When is the Best Time to Topdress?

Topdressing is best done when the grass is actively growing, typically in spring or early autumn. Topdressing can benefit any lawn, but it is crucial if you notice:

  • Persistent signs of disease
  • Yellowing grass leaves
  • Grass staying wet and soggy for hours after watering
  • Many weeds
  • Bare patches

Topdressing vs. Fertiliser

Topdressing evens out the lawn surface, incorporates new soil with existing soil, and provides good soil contact for new grass seed. Fertiliser, on the other hand, provides the nutrients needed for the grass to grow strong and healthy.

Do You Topdress or Fertilise First?

It is advisable to fertilise your lawn before topdressing.

Benefits of Topdressing

  • Improves soil aeration
  • Enhances soil quality
  • Breaks down thatch
  • Adds organic matter to the lawn
  • Helps soil retain moisture
  • Can amend or modify the soil
  • Reduces stress on the lawn from foot or vehicle traffic
  • Evens out dips or hollow spots