After some time it’s natural that moss will start to become an unwelcome addition within your garden or on your conservatory. You may even have to check out our guide to the best conservatory roof cleaner if you find it growing in between the panels above. This occurs especially in the spring or summer when the humidity is thick and the temperature soars. The guide below explores the 5 best moss killers.

Not only do these moss killers work for your lawn, they are equally great moss killers for the roof as well. As an added advantage, some of these moss killers also have active ingredients that aims to inhibit further growth as well as acting as great weed killers if needs be.

Moss is a type of non-vascular plant that takes the appearance of hair. They grow on logs, rotting wood, rocks and weak soil. Funnily enough, they don’t even need water to grow. They absorb moisture from nutrient-thin soil, air and rocks. They invade, multiply and populate your whole space. Regularly checking outdoor furniture, such as your garden storage bench will help to avoid unmanageable levels of growth.

In this article, we review two type of moss killer. The first are liquid killers, requiring you to dilute with water before you use. The second are powdered moss killers, requiring the use of your best lawn spreader to disseminate.

As we have a bias for products that are multi-purpose, some of these moss killers that are great for general lawn care and many also have weed killing properties. They are also biodegradable, environmental and ozone friendly.

Take a look at 5 of the best moss killers below.

1

Wet & Forget - Moss Mould Lichen & Algae Remover

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We couldn’t ask for more from a product that you simply spray on a surface and let it work its magic, killing the moss for you. This solution from Wet & Forget removes moss, moulds, lichen and algae from your lawns, roof panels and conservatory exterior, helping to restore your space to its original gleaming state. 

Used by several professional cleaning services, this product cleans every surface you can think of ranging from, glass, to wood, rocks and any surfaces you need to get clean with just a dab or spray of the formula. You don’t need to wash or scrub and neither do you need to apply with a special equipment. It can also be used as a weed remover.

To use, simply mix the solution with water and spray on the moss. Reapply as required if you see little effect after a day or two. For really stubborn moss it may take substantially more of the solution, more regularly, to kill it off.

This is a non acidic, non-caustic solution that doesn’t bleach the surfaces you are applying it to. Additionally, the cleaner residue left on the surface acts as protective agent that prevents the further growth of weed or moss in the short-term. Take care when applying as this solution is prone to killing other plants, should they come into contact with it.

Key Features:

Leave-in cleaner

Protective residue prevents further outbreaks of moss

Solution is biodegradable

Specification:

Brand

Wet & Forget

Weight

5 kg

Volume

5 litres

Pros

Doesn't bleach surfaces

No special requirements or equipment is required

Cons

Prone to killing other plants should they come into contact with the solution

May take numerous applications for it to take affect

2

Maxicrop Moss Killer

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The Maxicrop Moss Killer helps the restoration of a lawn or flower bed by killing unwanted moss and promoting the restoration of existing plant life. The fast-action solution uses natural seaweed extract and contains ferrous sulphate and nitrogen. This help serves as an alternate source of fertilizer, blackening the moss from the moment the solution hits it and boosting the growth of your lawn.

Designed to remove and kill moss whilst encouraging the restoration of your flower bed and lawn, this solution from Maxicrop is also eco-friendly – a little certainly goes a long way whilst having environmental benefits. It is highly effective, giving visible results within hours.

It is fairly easy to use. Shake well before use and dilute a small quantity in water before spraying generously on the moss. Any little contact with the moss blackens and kills it. Unlike the Wet & Forget moss killer above, you don’t have to worry about this solution killing neighbouring plants or flowers. This makes it ideal if you have a small flowerbed or are growing fruits and vegetables around your garden or in your conservatory. Application twice in a year should do the job. It’s that efficient.

The only objection to this product is that it can be prone to staining surfaces within the home, so we recommend outdoor use for this one. Take care with exposing it to skin as well as it may burn.

Key Features:

Dual-action moss killer and lawn reviver

Uses seaweed extract with ferrous sulphate and nitrogen

Specification:

Brand

Maxicrop

Weight

3.1 kg

Volume

2.5 litres

Pros

Great for improving rooting and grass regrowth

Visible benefits within hours

Does not kill surrounding plants

Cons

Can stain indoor surfaces and skin

3

Smartseal Moss Remover (Moss Clear)

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The Smartseal Moss Remover is another great time saver. It saves you the pain of scrubbing or high-pressure washing, you only have to spray the diluted mixture on the moss and wait for it to take effect. A favourite for professionals, it is great with other unwanted growths, like algae and fungi.

It works wonders for a conservatory lawn and roof tiles, walls, concrete, and glass. It is also effective on asphalt and rock, killing moss at the core in tough-to-reach areas.

It is entirely biodegradable, doesn’t bleach your surfaces and has not been made with acidic chemicals. A little goes a long way, just mix it in a ratio of 1 to 5 or 1 to 3. If there is a large spread of moss or algae, then apply more as required. The 5 litre volume should clear around 125m² worth of moss and visible results will be clear within 24 hours.

Protective gloves are advised during application and it should be sprayed using a watering can or a pressure sprayer. Once the area is dry, then the area is safe once again.

Key Features:

Multi-surface solution

Protects against re-growth of Moss & Algae

Biodegradable

Specification:

Brand

Smartseal

Weight

5 kg

Volume

5 litre

Pros

Fast-action killer that clears large surfaces with little of the product

Simply spray and leave to dry on the surface

Cons

Protective gloves advised

Area needs to be kept dry to work effectively

4

EverGreen Complete 4-in-1 Moss Killer

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Designed to promote lawn growth, greener gardens and removes instances of weed and moss, The EverGreen Complete 4-in-1 Moss Killer is the lawn food that your garden needs. 

It is formulated with a WaterSmart formula which contains ingredients that actively enhance your plants water absorption and nutrient uptake, as well as protecting it against stress and drought. This keep your lawn aesthetically pleasing and healthy looking. 

As for dealing with the moss, spread it evenly on top of the surfaces that have been impacted and leave for it to works its magic. The moss quickly blackens out after dying, making it easy to rake off leaving your healthy lawn intact.

A little added advantage is that alongside the lawn care and moss extermination, it also doubles as a weed killer – as most of the solutions listed here do. It is best used between April and September with a maximum usage of twice a year being recommended.

Take care when applying. Stick to the application instructions and do not over-apply, as this may cause patches on your lawn as it kills the moss. 

Key Features:

4-in-1 feeds and greens the grass, kills moss and weeds.

Drought support for plants

Specification:

Brand

EverGreen

Weight

12.6 kg

Coverage

360m²

Pros

Long-lasting nutrients continue to kill the feed the grass, showing a visibly greener lawn after 6 weeks.

The nutrients also helps to develop strong roots protecting against drought.

Cons

Requires a lawn spreader

Takes 7 days to see effect

5

Miracle-Gro EverGreen 4-in-1 Spreader

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The Miracle-Gro Evergreen 4-in-1 Spreader is similar to the previous EverGreen product listed, except this has a built-in spreader for additional convenience. 

This Miracle-Gro 4-in-1 Spreader is effective in keeping your lawn roots strong, improving their general health whilst killing both moss and weeds in the vicinity. This product prides itself on ease of use and it comes with a built-in applicator. Usage twice a year is sufficient for most gardens, meaning you only need minimal work and application to achieve the desired results. Over application may in turn be a detriment, placing additional stress on your lawn and killing the roots.

To achieve best results, it’s recommended using the spreader between April to September. It also has a tendency to stain, so ensure you avoid the patch it is applied on until you water it or rain arrives. Though this solution is ideal for most lawns, it’s important to wear protective equipment when using to avoid the hard-to-remove stains it may leave on your cloth or hands. 

Except

Key Features:

WaterSmart formula helps to protect lawn against drought and stress

Kills moss and weeds whilst promoting growth of the lawn

Specification:

Brand

EverGreen

Weight

3.9 kg

Coverage

100m²

Pros

4-in-1 solution not only gets rid of moss and weeds, but helps promote the growth of the lawn

Comes with a built in applicator/spreader

Cons

Solution can take some time to work