Will Grass Grow Through Topsoil?

A common question asked by gardeners and landscapers alike is can you apply topsoil over an existing lawn and if so, can the grass grow through? There could be several reasons for asking this question from wanting to level a lawn, adding extra nutrients to your garden turf without digging it up, achieving better drainage and much more! 

In this guide, we’ll give you the answer once and for all so you don’t have to keep wondering whether it’s okay to put topsoil over an existing lawn – plus we give you the top tips to keep your grass looking lush when adding topsoil!


Can I put topsoil over grass?

If you’re looking for a short answer, then yes, you can put topsoil over grass and existing garden lawns. Although it’s possible for grass to grow through the topsoil, this can only be successful depending on the thickness of topsoil applied as a top dressing. Please note that before applying topsoil over existing grass, you will need to mow the turf first.

As a general rule of thumb, you should add 2-3cm of topsoil directly on top of the turf as this will give enough space for the grass tips to shoot through onto the other side. Any more than this amount can cause the existing lawn underneath to die due to a lack of sunlight and too little won’t create the desired result.


Prepare the ground first

Before setting out on putting topsoil over an existing set of lawn turf, there are a few things to be considered and checked first.

Mowing the grass

Before applying over existing grass, you will need to mow the turf first. This is recommended due to the fact it will give you the best chance of having a lush lawn when the grass eventually grows through the layer of topsoil.

When should you put topsoil on top of a lawn?

Spring is the best time of year to put topsoil on top of garden turf, as this will allow your grass time to grow whilst providing sufficient water and nutrients for the soil to settle.

Pre-water your lawn

Several days before you plan to apply lawn and turf topsoil over grass, it will need to be watered to ensure that the existing lawn is in the best condition possible. Be careful not to overwater your lawn, as wet grass may not seek through the layer of topsoil.


The next steps

Once you have placed an even 2-3cm layer of topsoil above the desired location, you should push the soil down with either your feet, hands or flat side of a rake and make it compact, then water the soil gently and leave to settle in.

After a couple of days, you should add grass seed and a further light layer of topsoil in order to establish a thick and healthy patch of grass. Again pat down and water gently.

If you’re looking to overhaul your garden and want to create a new patch of grass, we’ve also created a guide on how to lay turf on topsoil as the method will be different from the one laid out here.


Where can I purchase topsoil and turf from?

Alsoils+ have been servicing domestic and trade customers for over 35 years with the highest quality topsoil, leaving you safe in the knowledge that we can cater for your needs. We supply premium topsoil and turf, so you can be sure your garden is given the love it deserves.

About the Author

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Alsoils

The Alsoils Team

For more than three decades, Alsoils has been a trusted name in delivering superior soil, compost products and offering landscaping services. Based in Hampshire, Alsoils caters to a diverse clientele, including both homeowners and businesses. Our team are experts in all things gardening, so you can be sure you get the very best advice for topsoil, compost, manure and so much more!

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Based on 14 reviews
Mark Belshaw
Mark Belshaw
2023-02-17
Ordered 2 bulk bags of manure on Wednesday, late afternoon and all was delivered by Friday lunch time. Great quality product and excellent delivery turnaround.
Charles Smith
Charles Smith
2022-06-30
Excellent, from order to delivery. 10 tonnes of loose load top soil delivered within a few days. Best price and the 10mm screened soil is great quality. Thank you
Lesley Barry
Lesley Barry
2022-05-15
Excellent product ordered 4 bags of top soil the driver was so accommodating as we have a very long driveway. The customer sevice was excellent. Thank you.
David Robberts
David Robberts
2021-05-13
Excellent product at a sensible price from a local supplier. Staff are friendly and willing to help: I asked if just one bag of topsoil could be delivered quickly and it arrived next day! Great service.
Mark Hibberd
Mark Hibberd
2018-06-11
Smooth execution of the transaction and delivery. Very helpful phone call and conversation. Ordered three bags of Border Blend topsoil. Paid by Paypal. They delivered, on the specified date, carefully, exactly where I wanted the bags placed. All in all, a very pleasing purchase. The topsoil was excellent and had been very carefully prepared. No lumps. Would definitely recommend and I will use again. Everyone I spoke to was nice and helpful.
David Stamp
David Stamp
2015-09-18
Ordered topsoil on Tuesday came by Friday at the exact time quoted. Was WAY cheaper than anywhere else (by about £15 per bag) and was dropped off via a crane on back of the lorry, not by pallet which most of the other places use. Soil was fine and dry. Brilliant !