Best Moss Killer For Lawns: Reviews of Popular Products and Buyers Guide

best moss killer for lanws

Most lawns will be home to moss at some point and if left untreated, it can spread.

Quickly.

If you have a moss infestation don’t worry, it’s fixable. But in order to treat and remove it effectively, you need the best moss killer for lawns that you can get your hands on.

As a professional greenkeeper, I’ve always had my ‘go-to’ moss killer. That said, there are so many products on the market so I thought I’d test a few of them out to see which is the best moss killer for lawns at home.

In this article, I also offer some advice about how best to use moss killer. So, by the end of your battle with it, you’ll have a virtually moss free lawn.

Oh, and when you’ve invested in the best moss killer for you and your lawn, you should read this article: The Ultimate Guide to Removing Moss From Your Lawn and Prevent it Returning.

IMPORTANT NOTE:

The presence of a lot of moss in your lawn is often a symptom of bigger problems like soil compaction and excess lawn thatch. It’s rarely the problem itself.

Killing moss without addressing the issues that caused it to grow in the first place will result in the moss growing back.

If your lawn is suffering from an infestation of moss, the killing and removal of it should be just one step in a partial or complete renovation of your lawn.

 

The Best Moss Killer For Lawns: My Top Picks


If you just want to know which moss killers I recommend and not have to trawl through this whole buyers guide, take a look below.

You can either click on the buttons to go buy your favourite product or click on the ‘My Review’ to read my review of that product.

 

tradefarmNI iron sulphateTradeFarmNI Iron Sulphate: The Best Liquid Moss Killer

– Easy to Mix and Apply
– Starts to Kill Moss Within Hours
– It Also Hardens Turf and Green Grass

View on Amazon.co.uk

Or Read My Review


 

evergreen mosskil
Evergreen Mosskil: The Best Granular Moss Killer

– Easy to Spread
– Moss Blackens in 7 days
– Not as Effective as Other Mosskillers

View on Amazon.co.uk

Or Read My Review


 

Moss OffMoss Off: The Best Chemical Free Moss Killer

– Safe to Use Around Kids and Pets
– Use it as Often as You Want
– Can Apply it All Year Round

View on Amazon.co.uk

Or Read My Review

 

Why Do I Need to Use a Moss Killer?


The most common procedure for getting rid of moss is to apply a moss killer, wait for a couple of weeks and then rake it out.

But why apply a moss killer in the first place, why not just rake it out?

Well, there are a couple of reasons;

Raking Untreated Moss Can Spread it to Other Areas of Your Lawn

Let’s say you have areas or patches of your lawn that have moss in them and areas without it.

If you rake it while it’s alive you better collect every bit of it. If not, or if you drop it or rake it into an area that’s not infected, it can establish itself quickly.

The result is that you spend all your time chasing the moss around your lawn, never getting it under full control.

Moss is Easier to Remove When it’s Dead

When you apply a moss killer, it desiccates the moss, breaking it down, killing it and turning it black.

Dead moss has no strength which means the moss is much easier to remove than it would be if it was alive.

 

How to Choose the Best Moss Killer For You and Your Lawn


There are many different types of moss killers on the market and it comes in a range of different ways.

So how do you decide which is the best moss killer for your lawn?

Here are a few things to consider;

How Much Moss is in Your Lawn?

Moss killer comes in a range of different products.

For example, you can buy dedicated moss killers or you can buy lawn feed and weed products that contain moss killer.

So take a look at how much moss inhabits your lawn. If it has been completely taken over by moss, use a dedicated moss killer.

If there is only a little bit then chances are you can use a feed, moss and weed killer if that’s what you prefer.

As a groundskeeper, my philosophy has always been to fertilise the lawn, kill weeds and deal with moss separately. So I always use a dedicated moss killer.

Liquid vs. Granular Moss Killer?

types of lawn fertiliser

Like different types of lawn feeds, moss killer comes in both granular or liquid forms.

Liquid or soluble moss killers generally work faster than granular products but tend to be lighter and only kill the top layer of moss.

Granular products, on the other hand, work slower but are heavier so are more successful a killing the lower sections of thick moss. That said, there are very few granular products that are dedicated moss killers. They’re generally part of a lawn feed product.

Do You Prefer Not to Use Chemicals?

There are a number of reasons to not want to use a chemical product on your lawn.

Three good reasons include;

  1. Classing yourself as an organic gardener
  2. Having kids and pets that like to use the lawn, and
  3. Not wanting to alter the pH balance of the soil with chemical products

Chemical free moss killers do take longer to work. However, there’s one product that works very well.

It’s called Moss Off.

Because it’s a natural product you can use it often as you want, kids and pets are safe and you won’t risk making the soil overly acidic.

 

The Best Moss Killer For Lawns: A Closer Look at My Top Picks


So now we’ve talked about what to consider when choosing the best moss killer for your lawn, let’s take a close look at my top picks.

 1. TradeFarmNI Iron Sulphate Review: The Best Liquid Moss Killeriron sulphate

Iron Sulphate (or Ferrous Sulphate) is the traditional moss control product of greenkeepers. It’s the moss killing component of most killer products and lawn sand.

TradeFarmNI moss killer is excellent!

How it Works

TradeFarmNI is a soluble moss killer which means it needs to be mixed with water and applied with either a watering can or knapsack sprayer.

When applied in smaller doses, Iron Sulphate can also be used as a liquid fertiliser to give the grass a boost of green colour, and also harden the turf against the stresses of winter.

However, there are two ways to use Iron Sulphate against moss.

Firstly, you can use it as a straight-up moss killer. Use it at a higher rate and it will kill moss. That said, because this is a soluble product, it’s will only kill the top 1-2cm of moss. If you have really thick moss in your lawn, rake first, apply it to the remaining moss and then rake a second time.

The second way to use iron sulphate against moss is to use it as a moss suppressant. The idea is to use it during periods of moss growth which is between Autumn, through the winter and early spring.  I like to give my lawn a dose of Iron Sulphate in November, January and March.

This will keep the moss from overtaking your lawn over the winter and make it much easier to rake out in the spring as part of your spring lawn care regime.

What’s Good About TradeFarmNI Iron Sulphate

Simply put, TradeFarmNI works.

It dissolves well for easy application through a watering can or knapsack sprayer.

You’ll see the moss turn black within a few hours of applying it. Just make sure you give it a good 10-14 days to kill as much moss as possible before raking it out.

And as Iron Sulphate should, it’ll give your lawn a nice green boost of colour.

Also, it contains absolutely no Nitrogen. This means you can safely apply it in winter and there will be no surge in grass growth. Instead, it’ll help keep moss at bay while hardening the turf against the stresses that winter brings.

It’s not a branded product like Scotts or Evergreen, but it works.

What’s Not So Great

The only problem I see with this product is the lack of a measuring scoop. Including one in the bucket would make measuring the dose amount easier.

As it is, you’ll need an old spoon or something of that nature.

What Other Users Think

Out of over 1,000 reviews, TradeFarmNi’s Iron Sulphate scores 4.5 out of 5 stars on Amazon and the reviews are overwhelmingly positive.

Naturally, there are a few complaints.

There are one or two reviews stating that it doesn’t dissolve very well. I’ve never experienced this but I always dilute it in warm water, not cold.

One reviewer complained that it made their lawn look really poorly before saying they applied it in the middle of a long, hot, dry summer. Iron Sulphate should always be applied in cool, damp conditions.

Then there are one or two complaints about the packaging. A couple of people complained that the bottom of the bucket was cracked and some of the powder leaked into the box so they had to store it in their own containers. I doubt this an issue with the product as much as some couriers not being as careful as they should be.

Overall Thoughts

TradeFarmNi’s Iron Sulphate does a stellar job at;

  1. Killing and preventing moss
  2. Stalling its growth over the winter
  3. Giving the grass a boost of colour and
  4. Hardening the turf for winter

I always have a tub of it in my shed!

 


tradefarmNI iron sulphateTradeFarmNI Iron Sulphate: The Best Liquid Moss Killer

– Easy to Mix and Apply
– Starts to Kill Moss Within Hours
– It Also Hardens Turf and Green Grass

View on Amazon.co.uk

 


 

2. EverGreen MossKil Review: Best Granular Moss Killer

evergreen mosskill

Like I said earlier in this article, there aren’t many granular moss killers on the market. The only one I could find for home use is Evergreen’s Mosskil.

How it Works

This is a granular product so there’s no need to dissolve it in water. You can either spread it by hand or with a spreader.

Unlike pure iron sulphate, Evergreen Mosskil contains Nitrogen which causes the grass to grow. This means you should apply it between April an September when grass is actively growing. Don’t apply it in winter, the Nitrogen will cause growth surge which can weaken the grass and make it more susceptible to disease and stress.

What’s Good About Evergreen Mosskil

The fact that it’s a granular product makes Mosskil very easy to spread and you should see the moss start to blacken and die with seven days.

Remember though, granular moss killers tend to take longer to get to work than liquids. Give it a good two weeks to penetrate the moss as deeply as possible.

The combination of Nitrogen and Potassium does help with grass colour and growth too.

What’s Not So Great

When used on a lawn with not much moss, it does a pretty decent job. That said, on thicker areas of moss, it didn’t penetrate as deeply as I thought it might.

Deeper levels of moss were still alive and kicking.

As such, I’d recommend raking your lawn before applying this product and then raking again a couple of weeks after application.

What Other Users Think

While plenty of users really like Evergreen Mosskil, there are plenty who are pretty underwhelmed by the results they experience.

A common complaint echoes mine; it greens the grass and encourages growth but when it comes to killing the moss it’s not great.

Several long-time users claim that it seems to have lost its potency and doesn’t seem as effective as it once was.

Maybe the people who really like it don’t have much moss in their lawn, to begin with? In that case, it’d be pretty effective.

Overall Thoughts

Like I said earlier, there aren’t many granular moss killers available, at least not for home use. So I was pretty limited in choice.

Although I’ve said this is the best granular moss killer for use on home lawns, I still prefer Iron Sulphate. Or if you prefer not to use chemicals, my next choice.

 


evergreen mosskilEvergreen Mosskil: The Best Granular Moss Killer

– Easy to Spread
– Moss Blackens in 7 days
– Not as Effective as Other Mosskillers

View on Amazon.co.uk

 


 

3. Moss Off Review: The Best Chemical Free Moss Killer

moss off review

If you prefer to not use chemical products on your lawn then VivaGreen’s Moss Off the best moss killer.

How it Works

Regular moss killers use high doses of iron to kill moss.

Moss Off is different.

It’s a completely natural and chemical free product. It contains natural oils and starches that coats moss in an invisible, biodegradable film. This coating stops the moss from drawing surface moisture or moisture from the air and because moss doesn’t have roots, it can’t draw moisture from the ground either. As a result, it dies.

When using Moss Off you’ll notice the moss doesn’t turn black as it dies. Instead, it turns brown. This is because there is no chemical process or reaction.

What’s Good About Moss Off

Because Moss Off is completely free of chemicals, it’s completely safe to use around kids and animals as well, as other plants and even pond life.

The fact that there are no chemicals in it also means you can use it all year round, whenever you like. You can also use it as often as you want too.

Although chemical products like Iron Sulphate can be applied multiple times a year, there should be a gap of several weeks. This is because you can alter the pH of your soil if you use it too often.

Also, high concentrations of iron in chemical products can cause orange or brown staining to paths and driveways. This staining is permanent.

No such problems with Moss Off.

What’s Not So Great

This really isn’t a criticism, more of an observation.

And that is the fact that Moss Off does take a while longer to work than a chemical product. The company behind the product, VivaGreen openly admit this.

If you like to work fast this could frustrate you but in my opinion, the benefits far outweigh the extra time it takes to kill moss.

Also, when compared to a product like Iron Sulphate, Moss Off is pretty expensive. That said, if you’re concerned about the health of your kids and pets, the environment and you’d prefer not to risk ruining other areas of your garden by staining them with Iron Sulphate, I’d say it’s well worth the extra cost.

Overall Thoughts

Moss Off is an excellent product.

Yes, it’s more and expensive and it does take a little longer to kill moss than a chemical product. But if you care about the environment, have kids and pets that play on the lawn this is the best moss killer for you.

 


Moss OffMoss Off: The Best Chemical Free Moss Killer

– Safe to Use Around Kids and Pets
– Use it as Often as You Want
– Can Apply it All Year Round

View on Amazon.co.uk

 

 

How to Use Lawn Moss Killer to Get the Best Results


The best way I have found to rake out a much moss as possible first, before using a moss killer to get the rest;

Step 1:

Rake out the dead moss with either a springbok rake or powered lawn rake. If you use a springbok rake, expect hard work and blisters. Wear gloves with talc in them will reduce the chance of getting blisters ever so slightly.

Rake the lawn twice, each time in a different direction to remove as much moss as possible.

Step 2:

Apply your chosen moss killer and give it 2 weeks to kill the rest of the moss. You’ll see it get blacker and blacker as it starts to die and break down.

Step 3:

Rake the lawn again to remove the remaining dead moss.

This should remove 90% – 95% of the moss in your lawn. Now you can get to work on other jobs like scarifying, aerating or re-seeding.

 

In Conclusion


To sum it up, here are my favourite moss killers again:

 

tradefarmNI iron sulphateTradeFarmNI Iron Sulphate: The Best Liquid Moss Killer

– Easy to Mix and Apply
– Starts to Kill Moss Within Hours
– It Also Hardens Turf and Green Grass

View on Amazon.co.uk

Or Read My Review


 

evergreen mosskil
Evergreen Mosskil: The Best Granular Moss Killer

– Easy to Spread
– Moss Blackens in 7 days
– Not as Effective as Other Mosskillers

View on Amazon.co.uk

Or Read My Review


 

Moss OffMoss Off: The Best Chemical Free Moss Killer

– Safe to Use Around Kids and Pets
– Use it as Often as You Want
– Can Apply it All Year Round

View on Amazon.co.uk

Or Read My Review

There are a lot of moss killers on the market. Some of them are excellent and some not so much.

Take Evergreen’s Mosskil.

It’s made it onto my of best moss killers for lawns as the best granular product but that’s only due to a lack of options and it definitely wouldn’t be my first choice.

TradeFarmNi’s Iron Sulphate and VivaGreen’s Moss off are both excellent and I’d choose either one of them over the Mosskil.

Now it’s Over to You

Has this article helped you choose a moss killer for your lawn?

Or do you have a favourite moss killer that I haven’t mentioned?

I’d love to hear your thoughts on my top choices and if you have any questions or anything to add, leave a comment below.

11 COMMENTS

  1. This was a very in depth article and really gave me a better understanding of what moss is all about. Thank in advance as I’ll begin treatment this month.

    • Hi Bob,

      As it’s currently January, just give the moss a dose of Iron Sulphate. Don’t start raking yet, it’ll be pointless as the current weather conditions aren’t good for grass recovery.

      Applying Iron Sulphate now will keep the moss at bay. Then, apply it again at the end of March and rake in April (providing the weather is on your side).

      Hope this helps,

      Tim

  2. Wish I had read this article and your reply to Bob’s comment before raking my lawn yesterday… oops. What is the best course of action now? Some MossOff and keep fingers crossed for lawn recovery (while avoiding walking on that bit of the lawn)?

    • Hi Stefan,

      Check the weather where for where you live over the next week or so.

      As you’ve started, you might as well carry on now as the weather has been quite mild.

      I’d aerate the area by spiking with a garden for and spread some new grass seed before treading it in to make sure there’s good contact between the seed and soil.

      Don’t worry too much, it’s not drastic and the problem can be fixed properly when spring rolls around.

      I hope this helps,

      Tim

      • Thanks Tim. I am just outside London so quite mild recently but some frost. Will wait for the weather to warm a bit and bear in mind I can do it more in spring. Garden fork is OK for aeration or worth buying a hand hollow tine aerator? Thanks again for the advice and a great website!

        • Hi Stefan,

          Thanks for your kind comments!

          If you haven’t hollow tined before or haven’t done so for a few years it would be a good idea to do it when spring rolls around.

          A hollow-tining fork like this one will work on small lawns:

          https://amzn.to/2CTEVRv

          Be prepared for some hard graft though!

          If you’ve got a large area to do, I’d recommend hiring a machine from your local hire shop.

          Hope this helps!

          Tim

          • Have never hollow-tined in my life – this is our first house! Lawn is about 5m x 25m so plenty of work but I don’t mind that. Will certainly get on it in spring with the hollow-tining fork and some seed etc. Lots of reading to do on the website!

            All the best

            Stefan

  3. I have an electric lawn rake to get 9 bags of moss out of an old lawn last September.
    Initially all was well now the moss is back with a vengeance. The lawn is salvageable but what do you recommend for heavy chalky soil that is prone to run off? I want to start the lawn care in March and ideally have a lawn to be proud of.

    • Hi Lisa,

      Thanks for your comment.

      Unfortunately, chalky soil is less than ideal if you want a beautiful lawn.

      Firstly, it tends to be very alkaline and most grasses prefer neutral or slightly acidic soil.

      It doesn’t absorb or retain moisture very well either which is crucial to the health of the grass. And it lacks in many of the nutrients grass needs.

      This might sound drastic, but have you thought about starting from scratch and replacing the soil? I appreciate this can be expensive, especially if you have a large area to landscape.

      If this isn’t within your budget, I would try hollow-tining your lawn in the spring and top-dressing with loamy topsoil.

      You should get away with doing this twice. Once at the end of March / beginning of April (weather depending). Then top-dress again in the autumn, then spring, then autumn etc.

      Also make sure you overseed and apply a good fertiliser.

      You can succeed with a lawn on chalky soil but it takes a LOT of work.

      I hope this helps, Lisa.

      Tim

  4. Thank you Tim.

    I’ll try the budget option first then if that fails I’ll start from scratch next year.

    I’ve been out inspecting it today and the moss killer I applied has started to work. Just can’t believe how quickly the moss re-established itself after I used the electric scarifier last year. I really do have my work cut out, I’ve agreed to open my garden this summer for the village open gardens and a grotty lawn just won’t do. I’ll let you know how it’s going.

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