What is Lawn Scarifying?
If you’ve ever found yourself staring at a neighbour’s lawn, wondering how they keep it so green, then it might be time to step up your lawn care game. From aerating your lawn to regularly mowing and feeding it, there are plenty of things you can do to keep it in tip-top condition - and scarifying is one of those techniques.
Lawn scarification is the process of removing moss and thatch from your turf to ensure your grass grows dense and looks its best. Although it sounds alarming, it just means that you scratch or rough up the surface of your lawn - in a good way, of course!
Typically, lawn scarification aims to remove most, but not all, of the moss, thatch and debris on your lawn. Organic matter can get trapped around the base of the grass - and scarification is what you do to get it out. It’s important to note that this debris isn’t necessarily a bad thing. It can actually help to protect your grass, but if there’s too much of it, it could have the opposite effect.
Benefits of Scarifying a Lawn
Scarification can improve the effectiveness of other lawn care procedures, making taking care of your grass easier than ever. By freeing up space around the base of the grass, fertilisers and seeds should both be better able to reach the soil rather than getting stuck in a layer of thatch and moss.
In addition, scarification helps to prevent your lawn from getting too dry. This is because it makes it easier for water to drain through to the soil. This helps to keep the grass itself hydrated and green, but it could also ease problems such as excessive wear and tear and cracking soil in droughts, too.
Furthermore, if left alone, thick layers of thatch can stunt grass growth and make your lawn look brown and straggly. It can reduce the airflow down in the undergrowth of your lawn, which isn’t good for your grass. Scarifying your lawn also helps to remove excess moss and weeds. If these remain, they could spread across your lawn and take over the grass, possibly even killing it off.
When to Scarify a Lawn
If your lawn is quite new, it’s best to give it the chance to properly establish itself before you begin scarifying it. As a rule of thumb, you should wait until your lawn is at least a year old to avoid doing unnecessary damage.
Once your lawn is well-established, you can scarify it between once a year and once every two years. Leaving it longer than this between scarifying could mean you have a harder task to face the next time you do it - and doing it too often could take too much thatch away and result in damage to your grass.
As for the time of year, we recommend scarifying your lawn in the early autumn. It’s important to get it done before the frosts come, as this could make the scarification process damaging to your lawn. Cold weather can make grass and soil harder and more brittle.
Similarly, you’ll want to enjoy as much of the summer as possible beforehand, as your lawn might not look its best immediately after being scarified. Giving the grass the winter to grow back densely should result in a lawn that looks lush and verdant, ready for the following spring and summer.
How to Use a Lawn Scarifier
The tools you use to scarify your lawn can depend on the size of the area you’re working with. If you’ve only got a small lawn, you may find you only need a rake to get the job done. However, for larger lawns or those with lots of moss or thatch to deal with, a purpose-built lawn scarifier can help to speed up the process.
Whichever tool you use, you should always make sure to prepare for scarifying your lawn. Two weeks beforehand, you should spread moss killer over your grass - that way you won’t be spreading moss spores during the scarification process.
On the day, it’s a good idea to start by mowing the lawn, making sure to catch the cuttings in a grass box. If you scarify the lawn while the grass is still long, you might find the process takes longer - long grass can tangle with your tools and slow you down.
So, now that your lawn is ready to scarify, how do you actually do it? Well, whether you’re using a rake or a motorised lawn scarifier, start in one corner of your lawn. Scarify from one side to the other, then do the next strip in the opposite direction, working your way along until you’ve covered the whole lawn. Then, do it all again, this time at right angles to your original path.
These two passes of your lawn should be enough to remove the majority of the moss and thatch from the grass. If you feel you need more, another pass may be necessary - but leave about 10mm of thatch to be safe. Remember, your lawn won’t look pristine immediately after you’ve scarified it, but it should look much better once the grass has had a chance to grow back.
If you want your lawn to look its best sooner rather than later, there are some things you can try to help speed up its recovery. Over seeding can help to stimulate growth in areas where your grass is thin on the ground or patchy, and should encourage denser growth in future. Meanwhile, adding fertiliser to your lawn should help to speed up that growth.
Within a few weeks, your lawn should be looking much better. With our handy tips for scarifying your lawn, you’ll be able to sit back and relax, safe in the knowledge that the grass isn’t greener on the other side.
