Mumsnet is supported by readers. All our writers obsessively research every product we recommend. When you buy through a link on our site we might earn commission but this never influences our product choices.
At this time of year, it’s not uncommon to see lumps of fuzzy green moss pop up on damp and cold areas of your garden.
While moss tends to look rather ugly and appears harmless, it can actually be quite destructive. Once established, moss holds moisture which causes the area below it to deteriorate, including driveways and patios. It can also turn pathways and wooden decking into slippery hazards.
In order to avoid a trip to A&E, you need a sure-fire way to remove moss from your hard surfaces, as well as a solution to a mossy lawn.
What are the different types of moss killer?
There are different types of moss killers on the market which can tackle moss on various surfaces.
Lawn moss killer: There are a number of reasons why moss may be growing on your lawn. Sparse grass cover, worn areas of turf, acidic soil conditions, shady areas, waterlogged conditions or even mowing too close can all cause moss to appear. In short, if your lawn is in poor condition, it is susceptible to moss growth. This is the reason why many lawn moss killers also help to improve the condition of the grass and soil. Not only does this make for a healthier-looking lawn, but it can also prevent moss from returning.
Lawn moss killer can come in granules or liquid form.
Moss killer for hard surfaces: If your decking, paving, driveway, roof, patio, garden ornaments or other outdoor surfaces have a bad case of moss, then a moss killer that you spray directly onto the affected area should sort you out. Some of these moss killers can be used neat while others should be diluted before use. Not every moss killer will be suitable for use on all surfaces, so check the instructions carefully before using, in order to avoid making a bad situation even worse.
What are the best moss killers?
- Best overall moss killer: Wet & Forget Moss Mould Lichen and Algae Remover
- Best budget moss killer: Wilko Ready to Use Path and Patio Total Moss Control
- Best moss killer for patios: Patio Magic!
- Best moss killer for lawns: Miracle-Gro EverGreen Autumn Lawn Care
- Best moss killer for artificial grass: Paw Origins Artificial Grass Cleaner
Here are the 10 best moss killers to buy right now as tried and tested by Mumsnetters.
1. Best overall moss killer: Wet & Forget Moss Mould Lichen and Algae Remover
Price: £27 (for five litres) | Buy now from Amazon
“We got someone to spray some long-term moss remover. It takes a few months to work but, three months on, it's definitely looking better than next door’s. It's called Wet & Forget.” GuyFawkesDay
“We have the same issue with our roof (on both sides!). We use Wet & Forget, which you spray on and leave.” Tappering
Wet & Forget Moss, Mould, Lichen and Algae Remover does exactly what it says on the tin.
Just use a good sprayer to apply the product to your patio, path, tarmac, block paving or roof and let it work its magic, with no scrubbing or rinsing required. Mumsnet users rate Wet & Forget particularly highly for tackling moss growing on the roof.
It’s worth noting that one five-litre bottle makes 30 litres of product, covering an area of up to 300 square metres, which is bigger than a tennis court!
- Requires minimal effort
- Works on a range of hard surfaces
- Very toxic to aquatic life
- Causes serious eye and skin irritation - use with care
2. Best budget moss killer: Wilko Ready to Use Path and Patio Total Moss Control
Price: £4 | Buy now from Wilko
If you have a bad case of the green stuff on your paths and patios, then this budget buy from Wilko is a simple and speedy way of sorting it.
Just one 1-litre bottle of Wilko Ready to Use Path and Patio Total Moss Control treats up to 35 square metres and promises visible results within hours. Unlike Wet & Forget, you don’t need to dilute Wilko’s product before use.
But be warned that this is strong stuff, so keep away from kids, and pets and take suitable precautions when using it.
- Good value for money
- Controls annual and perennial weeds
- Not safe to be used near kids or pets
- Contains acetic acid which can be dangerous if it comes into contact with skin, eyes or inhaled - take appropriate precautions
3. Best moss killer for patios: Patio Magic!
Price: £19 (for five litres) | Buy now from Amazon
“I use it at work for the slate-covered areas. You may have to do it a few times using a rake to turn the gravel over and spray the underside.” AlCalavicci
Another great moss killer that, much like Wet & Forget, is pretty self-explanatory is Patio Magic!
As well as being the best moss killer for patios, Patio Magic! also casts a spell to banish moss from the tarmac, painted or glazed pots, garden ornaments, brickwork, greenhouses, conservatories, caravans and other hard surfaces.
Expect to see results within two to four days and protection for six to nine months.
But make sure you keep the kids and pets away from the patio until the moss killer has dried.
- Also works on other hard surfaces
- No need for scrubbing
- Takes time to work
4. Best moss killer for lawns: Miracle-Gro EverGreen Autumn Lawn Care
Price: £14 | Buy now from Amazon
Miracle-Gro EverGreen Autumn Lawn Care is the ideal way to kill moss while toughening up your lawn ahead of the winter months.
The treatment is packed full of nutrients to help create stronger, tougher roots while iron keeps moss growth in check.
Just spread the granules, and water in, and expect to see results in seven days. Just don’t forget to rake the moss out once it’s died.
- Improves lawn condition
- Results last for several weeks
- You may struggle to get even coverage
- Pets and children must be kept off the lawn while treatment is ongoing
5. Best moss killer for artificial grass: Paw Origins Artificial Grass Cleaner
Price: £8 | Buy now from Paw Originals
“At least twice a year it needs moss killer down and a good brush out to remove some of the dead moss.” WeAllHaveWings
Love them or hate them, artificial lawns deserve some TLC too.
The Paw Origins Artificial Grass Cleaner kills moss, algae, bacteria and viruses from fake grass and claims to be safe enough to use on dog beds and bowls.
It’s also great for eliminating unpleasant odours, swapping the smell of dog wee for the much more pleasant aroma of freshly cut grass.
One litre of concentrated product can be diluted to make 10 litres, but it can be used neat too.
- Good value for money
- Safe for pets
- Leaves behind freshly cut grass smell
- Can cause eye and skin irritation, so apply with care
6. Best lawn feed weed and moss killer: Aftercut All In One Lawn Feed, Weed and Moss Killer
Price: £14 | Buy now from Amazon
“The presence of moss is an indicator that all is not right with the soil (as far as the lawn is concerned) [...] you need to champion the lawn. If the grass grows, the moss will go.” BrownCurlsAmberEyes
If your lawn is in need of a general MOT, then the Aftercut All In One Lawn Feed, Weed and Moss Killer is the product for you.
As well as strengthening the grass, this product kills moss and no less than 12 different types of weeds.
Just sprinkle it over the lawn, make sure the area is watered within 48 hours and watch it get to work. After seven to 14 days, the moss will turn black and will need to be raked up and removed. You can even mow the lawn as little as four days after treatment if you wanted.
For the best results, use between May and August when the moss, grass and weeds are actively growing.
- Good value for money
- Will need to repeat treatment for optimal results
7. Best moss killer for hard surfaces: Job Done Moss Killer
Price: £20 (for three litres) | Buy now from Amazon
If your block paving or decking is covered in a furry green blanket, then Job Done Moss Killer will have your hard surfaces sparkling in no time.
This professional-grade moss remover also makes light work of algae growing on sheds, fences, outdoor walls, terracotta pots and any other permeable outdoor surfaces. Just spray the product directly onto the moss and after five minutes a foam will appear as a handy guide to show you which areas have been covered. If necessary, you can repeat the treatment after 14 days.
- Easy spray application
- Product foams up to show you where it’s been applied
- Can’t be used in rain, expected rain, drought conditions or frost
- Can only be used three times a year
8. Best organic moss killer: Viano MO Bacter Organic Lawn Fertiliser & Moss Killer
Price: £25 | Buy now from Amazon
This lawn feed and moss killer is 100 percent organic and, unlike the Aftercut All In One Lawn Feed, Weed and Moss Killer, it doesn’t leave a black mess behind.
Viano MO Bacter Organic Lawn Fertiliser & Moss Killer also improves the condition of your soil, which will make it harder for moss to grow back.
For best results, the manufacturers recommend using the product between March and May, so there’s no excuse not to be prepared.
- Safe to use on stonework
- Harmless to plants and animals
- Not meant for year-round use
9. Best ready-to-use moss killer: Resolva Moss Killer
Price: £8 | Buy now from Amazon
If you need to rid your garden of the mossy menace fast, then Resolva Moss Killer is the answer.
Just like the Wilko Ready to Use Path and Patio Total Moss Control, Resolva can be sprayed directly onto mossy surfaces, with no dilution or any other faffing around required.
Resolva kills moss on permeable surfaces such as block paving, gravel and decking within just a few hours. But just make sure you give the bottle a good shake before use as this can affect how quickly you will see the result.
- Easy to use
- Good value
- Not suitable for use on artificial grass
- You must shake the bottle well before use or you may end up having to reapply
10. Best liquid moss killer for lawns: Pro-Kleen Iron Sulphate
Price: £14 (for 2.5kg) | Buy now from Amazon
If moss is taking over your lawn, then you should bag yourself a bucket of this.
Used by park keepers and groundsmen across the land, a 2.5kg tub of Pro-Kleen Iron Sulphate can make up to 2,500 litres of liquid moss killer. Just spray on the affected areas of the lawn and the moss will start turning black within hours. Expect to see the final results within seven to 10 days.
Iron Sulphate can also be used as a liquid fertiliser and harden the turf to give some protection over the hard winter months. You can also use it to curtail the growth of moss over the winter. In short, if you love your lawn, keep a bucket of this in the shed.
- Can be used wet and dry (although it produces the best results when wet)
- Can also be used as a fertiliser and turf hardener
- Good value for a big bucket
- For use on lawns only - not suitable for use of driveways, decking and other hard surfaces
- Less effective on dry grass - wait until lawn is wet before applying
What is the best time to kill moss?
Damp autumnal conditions are perfect for cultivating moss on outdoor surfaces. Moss on lawns can be a temporary problem caused by damp or more persistent, suggesting a problem with the underlying condition of your soil.
The best time to treat moss on your lawn is in the autumn or spring when the moss is actually growing. Improving the health of your lawn will help to keep moss at bay, so once you’ve cleared it, it’s worth investing in some quality lawn feed.
What kills moss permanently?
If you want to ensure that the moss on your lawn is gone for good, you should seek out a chemical treatment containing ferrous sulphate, otherwise known as sulphate of iron.
How do I get rid of moss?
Always read the instructions carefully before applying moss killer and make sure you wear protective clothing, such as gloves or goggles, if required.
Some moss killers can be used neat while others need to be diluted. Once you’ve established the strength you need, apply it to the affected hard surface. You will need to keep children and pets away from the treatment area as instructed. Some moss killers are very harmful to aquatic life, so bear that in mind if you have a pond, stream or drains near the area you need to treat. You should expect the moss to be dying off within a few days.
In the case of applying moss killer to lawns, scatter the granules evenly and water as directed. After a couple of weeks, rake the dead moss out. Leaving it behind may cause the problem to spread to other areas of your lawn.
How do you make homemade moss killer?
There are various recipes online that claim to kill moss. These usually include washing up liquid, and bicarbonate of soda or vinegar. Some Mumsnetters swear by these natural remedies, which are often kinder to the environment and wildlife than chemical alternatives. However the effectiveness of these natural alternatives varies, so if you want something that’s guaranteed to kill moss fast, then you may wish to consider one of the products on this list instead.
When is the best time to put moss killer down?
According to the Royal Horticultural Society, the best time to put moss killer down is early autumn and mid to late March.
What is the best moss killer?
Mumsnetters can't get enough of Wet & Forget Moss Mould Lichen & Algae Remover which is why it is our pick for the best overall moss killer.
What is the best lawn moss killer?
Pro-Kleen Iron Sulphate is the go-to lawn moss killer for park keepers and groundsmen up and down the country for good reason. And who are we to argue with the professionals?
How we chose our recommendations
Mumsnet has been helping parents make their lives easier since 2000 and, in those years, we’ve seen, tried and reviewed thousands of products. Transparency is really important to us and that's why we're always upfront about where we find our recommendations.
We write about products that we feel offer the best value to most parents – the ones that our users would recommend to their own friends and family.
Recommendations from real parents
Before we recommend new products, we always ask our trusted Mumsnet users, of which there are more than 7 million each month. That’s a lot of honest, impartial advice.
We always ensure our information represents the latest recommendations from experts so you can rely on it. We research each product thoroughly to ensure it follows the latest expert advice and stands up to scrutiny. Here we consulted reputable sources such as The Royal Horticultural Society and took note of what they looked for in a moss killer and which ones they were recommending to their readers.
We also scour the internet, leaving no stone unturned to check out real reviews from customers who have bought the products themselves and given both positive and negative feedback.
Celebrated best products
Finally, we cross-referenced all of the above information to find the best moss killer that had won the most accolades and recommendations across the board to bring you a selection of the best ones at various price points. We think there’s something here for everyone.
Why you should trust us
We work hard to provide unbiased, independent advice you can trust. We do sometimes earn revenue through affiliate (click-to-buy) links in our articles. This helps us fund more helpful articles like this one.