How to level a lawn

Inspired by a useful lawn levelling guide. This article draws on the "How to make your lawn LEVEL and Flat - Beginners Guide to lawn levelling" video, which gives a clear, practical walkthrough of fixing hollows and bumps using the topdressing method. Straightforward advice, no fuss, and relevant to the UK climate where lawns take a battering over winter and need attention every spring.

1. Assess the problem first

Walk the lawn slowly and note where the bumps and hollows are. For small, scattered dips (under 25mm deep), the topdressing method works well. For deep hollows or humps, you need to lift and re-lay the turf in that area rather than just filling over the top.

Mind you, if the lawn has a general slope across it, that's a different job entirely - you can't topdress a slope level without moving a significant amount of soil. Think carefully about what you're actually trying to achieve before you start.

2. Choose the right time of year

Spring is ideal - late March to May in the UK. The grass is actively growing and will push through topdressing quickly. Autumn (September to October) works too, though recovery is slower going into winter.

Avoid doing this in summer drought conditions when the grass is stressed, or mid-winter when growth has stopped completely. The grass needs to be growing to work the mix down into the sward.

3. Scarify and aerate before you top-dress

Give the lawn a good scarify to remove thatch and open up the surface. Then aerate it with a hollow-tine aerator or a garden fork pushed in 150mm at regular intervals across the area. This gives the levelling mix somewhere to go, and it means the grass roots can breathe better once the work's done.

A compacted, thatch-heavy lawn won't take topdressing well. The mix sits on top rather than working in. Scarifying and aerating first makes the whole job more effective.

4. Mix up your levelling dressing

The standard mix for UK lawns is roughly 3 parts sharp sand, 6 parts topsoil, and 1 part compost or fine peat substitute. The sand stops the mix from going sticky and compacting; the topsoil gives the grass something to grow into; the compost adds some organic matter.

For a hollow 20mm deep on a 2m x 2m patch, you will need roughly 80 litres of mix. Bag up or mix in a barrow - the exact ratio matters less than avoiding straight topsoil on its own, which will compact down over time and leave you back where you started.

5. Spread the mix into the hollows

Shovel the levelling mix into each hollow and spread it out with the back of a rake. Don't overfill - you want the mix sitting about 10mm above the existing grass, not buried under a big heap. The grass should still be visible through it.

Work across the whole lawn systematically rather than tackling one big hollow and missing smaller ones elsewhere. It's worth doing the whole surface while you've got the kit out.

6. Rake to a consistent depth and brush in

Rake the levelling mix out to an even layer, then use a stiff brush or the back of the rake to work it down between the grass blades. The aim is to get it into contact with the soil below rather than sitting on top of the grass. The grass tips should just be poking through.

If you've applied too thickly in spots and completely buried the grass, redistribute it rather than leaving it. Grass buried more than 25mm under topdressing will struggle to recover.

7. Water, wait, and repeat

Give the lawn a thorough water to help the mix settle. Over the next few weeks, the grass will grow up through the topdressing. Mow lightly once it has grown a little, and check whether the hollows have lifted. Most will need a second application at the start of the following season to get properly level.

That said, one good treatment makes a noticeable difference. Overly high expectations of a single pass are how frustration happens. Lawn levelling is a patient job.

When to call a handyman

Call Richard if the lawn has major subsidence, deep ruts from heavy machinery, or a widespread drainage problem causing waterlogging in the hollow areas. Those issues need more than topdressing to sort. For general levelling work and garden tidying, Richard covers Sandwich and the surrounding areas of Kent.