How to get rid of moss on a patio – gardening experts reveal 5 quick and easy methods

The lovely look of your outdoor seating area can be knocked by natural overgrowth, so how do you get rid of moss on a patio?

Luckily, it's simple, and you have a variety of chemical and natural methods that deliver stellar, and often instant, results.

Here, gardening experts reveal their top backyard cleaning tips to treat moss on a patio and spruce it up for spring and summer hosting.

How to get rid of moss on a patio

When getting rid of moss on patio pavers, bricks or slabs, you need to decide if a chemical method or a natural method is best for you.

Chemical moss removal works quickly when cleaning a patio but can be damaging to your yard and may be toxic for any pets (or children) in the household. Getting rid of moss naturally, on the other hand, can take a little longer but doesn't pose the same toxicity risk. More often than not, they can also be used to get rid of moss in lawns, too.

To help you decide, our experts have shared their top tricks for both if your patio is going green.

1. Kill moss naturally with vinegar

Ryan Harden, gardening expert and owner of The Harden Garden suggests cleaning with vinegar as the first line of defense against moss on a patio.

He says, 'Vinegar kills unhealthy parasites using acetic acid that alters its pH balance without the use of harsh chemicals.

'In a clean spray bottle [available in packs of three at Walmart], combine equal portions of water and vinegar and liberally spray the solution over any mossy patches on your patio. Ensure moist or shaded patches of the patio receive an extra dose. After 24-48 hours pass, scrub with a stiff-bristled brush, from The Home Depot, then rinse with water till clean.

'I recommend trying this method on a dry, sunny day to increase the effectiveness of penetration, drying, and scrubbing.'

2. Pressure wash

One thing people with clean patios always do is power wash regularly. This can help to dislodge moss and remove it without the use of harsh chemicals.

Ryan explains, 'Forceful streams of water remove parasites and spores, ensuring regrowth becomes impossible.

'For the best results when pressure washing a patio, set your pressure washer to low to avoid damaging the surface of your pavers. Maintain one angle and work on small sections at a time gradually.

'Again, this method is best used on a sunny day to allow adequate time for the newly sprayed area to completely dry. This reduces the threat of moss spores re-infesting your freshly clean patio.'

If you do not own one, you can rent equipment such as a pressure washer from The Home Depot or your local cleaning appliance store.

3. Opt for a commercial spray

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After cleaning

Before cleaning

If you are looking for faster-acting, long-lasting results and don't mind using a gentle chemical spray, Chris Turner, owner and landscape designer at Elevate by Design suggests Wet & Forget Moss, Mold, Mildew & Algae Remover, available at Amazon.

He says, 'This is a solid commercial option. Just spray and let the rain do the work over time.'

I use the Wet & Forget spray on my patio every spring and see long-lasting results time and time again. It mitigates the need to scrub, limits water waste, and is bleach-free, meaning it is better for the environment than other commercial chemicals. Note that it can be damaging to aquatic life, however, so avoid using it near ponds or pouring it down drains.

4. Sprinkle lawn sand

Lawn Sand, available at Amazon, isn't just sand: it's one part iron sulfate, three parts ammonia sulfate and 20 parts dry sand, and it can be used to kill moss without killing grass bordering the patio.

Sprinkle it on, it will kill moss on patio, and broad leaf weeds too. Once they have turned black you can simply remove them, then sweep or hose off the sand.

5. Diluted bleach

Although you generally do not need harsh chemicals to clean well, Rafi Friedman, president at Coastal Luxury Outdoors says, 'For especially stubborn moss, a mild bleach solution will do the trick. Use as little as you can get away with; the bleach may damage your patio or lawn in the area.'

Because bleach is normally one of the many things you shouldn't use when cleaning your patio, using a spray bottle can help you target this treatment to the troublesome moss to prevent damage.

How to prevent moss on a patio

Preventing moss on a patio comes down to limiting the advantageous growth factors says Chris Turner, 'Moss tends to appear in areas that are shaded, damp, and poorly drained, where moisture lingers and sunlight is limited. '

Therefore, to prevent moss on a patio, you can:

1. Improve garden drainage ideas to pull water away from the patio, preventing damp spots.
2. Increased sun exposure. Chris suggests 'trimming back overhanging vegetation and sweeping the patio to remove debris cover,' for this.
3. Seal the patio surface with a protectant sealant such as BEHR Premium Wet Look Sealer from The Home Depot. Ryan Harden explains, 'A good quality patio sealant, when applied correctly, limits moisture penetration to prevent moss and algae growth.'
4. Remove moss as soon as you spot it to limit the spread and prevent it from taking root.
5. Clean your patio regularly to remove debris.

Meet the experts

Chris Turner

Chris Turner is an expert in designing gardens and outdoor spaces. He is the owner and designer at outdoor architecture practice Studio Nisho. With a keen eye for aesthetics and a passion for crafting outdoor masterpieces, Chris has built a reputation for transforming garden spaces into extraordinary environments.

Ryan Harden

Since starting The Harden Garden in 2020, Ryan has turned a love for growing into a thriving plant business with a sustainable ethos. He is passionate about encouraging more people to embrace plant ownership, no matter how limited their space.

FAQs

Can you use washing powder to remove moss?

You can use biological washing powder or use dish soap to kill moss by simply sprinkling it liberally over the troublesome area. As with other moss-removal methods, consider the impact on plants nearby, wildlife, and how you will remove the powder remnants from the pavers afterward.

There are simpler remedies, such as removal with a broom or pressure washer, that allow you to simply compost the dead moss.

Does baking soda remove moss from a patio?

Baking soda sprinkled onto wet moss can help to kill small patches of fresh moss, but it is slow-acting and isn't that easy to wash off pavers afterward, so look to better solutions, such as a stiff broom, a pressure washer, moss killer or vinegar.

The good news is that many of the natural moss removal methods for patios can also be used to clean outdoor furniture and remove moss and algae staining, too. Be sure to check the manufacturer guide first, however, and test in a small, inconspicuous spot to avoid lasting staining or damage.