After a hot summer, your lawn may be looking a little worse for wear, with dry patches, thinning grass or an increase in moss. Autumn is the ideal time to help it recover – and scarifying is one of the most effective jobs you can do.
Over time, dead grass, moss and other organic matter can build up between the soil and grass blades, creating a layer of thatch. While a small amount can be beneficial, too much can stop water, air and nutrients from reaching the roots properly. Removing it helps the lawn recover before winter and grow back thicker next spring.
Why you should scarify your lawn in autumn
While it might not be as aesthetically-pleasing a task as planting autumn shrubs, scarifying is one of the best tasks to do in the garden this season.
‘Autumn is one of the best times to scarify because the soil is still warm enough for grass to recover before winter,’ explains John Marshall, operations director and landscaping expert from Bentham Golf Course and Wenningdale Escapes.
‘Removing built-up thatch allows air, water, and nutrients to reach the roots more easily, encouraging stronger growth and a denser lawn the following year.’
Scarifying can also help tackle moss, which can thrive in damp, compacted lawns and compete with grass for the resources it needs to grow.
More on lawn care:
- How to revive your brown lawn after a hot, dry summer – 4 simple tasks to help it turn green again
- 5 simple ways to create an organic lawn for stronger, healthier grass
- Shade, kids or dogs? How to pick the best lawn for your garden
The best time to scarify your lawn
Timing and technique are important when scarifying your lawn.
‘Early autumn is the best time to scarify a lawn, as it will have enough time to recover before the first frosts,’ explains Richard Barker, horticultural expert and commercial director of LBS Horticulture.
The exact timing will vary across the UK, depending on where you live. In parts of the Scottish Highlands, the first frost can arrive as early as mid-October.
How to scarify your lawn
'To scarify your lawn, begin by mowing it to a low height. Then, use a scarifier (either electric or manual) or a garden rake to work through the lawn, removing the thatch,' explain the gardening experts at British Garden Centres.
For smaller lawns, use a spring-tined rake to gently work through the grass and remove the excess thatch. ‘Try not to be too rough when doing this to avoid damaging the lawn, and ensure that you leave a small amount of thatch behind to help protect the lawn,’ says Richard.
Work in several different directions as you rake to ensure the thatch is removed evenly, rather than concentrating on one area.
Once you’ve finished, add the removed thatch to your compost heap rather than throwing it away.
Then apply a lawn feed to provide essential nutrients for the upcoming dormant season. ‘Your lawn is likely to look worse after scarifying and aerating, so you can apply a lawn fertiliser to boost growth, or allow it to recover by itself,’ adds Richard.
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With the right timing and a gentle approach, scarifying can give your lawn a stronger chance of bouncing back next spring – even if it looks a little worse before it gets better.
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