Dethatching and Scarifying Tips

Dethatching and Scarifying with ProLawnsAu

Over time, your lawn can develop a layer of thatch. Thatch is the spongy build-up of dead runners, stolons, and old clippings that sits on top of the soil. A little bit of thatch is normal, but if it builds up too much, it can choke your lawn by stopping water, air, and nutrients from reaching the roots. The result is a patchy, stressed lawn that struggles to stay green.

Signs you need to act are a spongy feel underfoot, uneven mowing, or difficulty pushing the mower. Leaving it too long will only make it harder to fix, so tackling it at the right time is key.

Scarifying

Scarifying is the process of cutting into the thatch layer to break it up and remove the excess. A scarifying machine or vertimower is the easiest way for medium to large lawns, but for smaller areas you can use a metal rake to get the job done. It might look rough straight after, but don’t panic. With a bit of care your lawn will bounce back stronger and healthier.

Rotary mower

If you don’t have access to a scarifier, a rotary mower with sharp blades and a catcher can help reduce excess thatch. Lower the mowing height gradually over a few passes and collect the debris in the catcher. This approach won’t remove everything, but it will help keep the thatch layer under control.

Timing

The best time for dethatching and scarifying is during the growing season when your lawn is actively repairing itself. For warm-season grasses like couch, buffalo, and kikuyu, mid to late spring is ideal. Avoid dethatching in winter or when frost is a risk, as the lawn won’t recover quickly.

Aftercare

Once dethatching or scarifying is complete, give your lawn a boost with fertiliser and water to help it recover. A product like Turf Tukka is a great all-round option to feed your lawn and promote new growth.