How To Clean Garden Fences: Get Rid of Green Moss & Algae

Garden FenceYou only get one chance to make a first impression, and when it comes to curb appeal nothing makes a worse first impression than a filthy fence.

You may have resigned yourself to having green algae and moss all over your garden fence: after all, things like that thrive in a garden environment that’s hospitable to vegetation and they aren’t that easy to clean off.

The pressure washer, that go-to outdoor cleaning tool, is too powerful for fence cleaning. Those powerful blasts of water can easily strip away paint and damage wood. But you don’t have to live with a grungy, grimy fence. Read on for some simple tips and tricks that will help clean your garden fence so it makes a flawless first impression.

How To Clean A Wooden Garden Fence

This is hands down the best product we’ve used to clean a wooden fence:

Pro-Kleen Spray & Walk Away Fence Cleaner: Remove Green Mould & Algae Remover (5L)

2 new from £14.95
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as of August 16, 2022 7:23 pm

The 5-liter Pro-Kleen Green Mould & Algae Remover is pretty much incomparable to other products on the market.

The 5-liter size is actually a tremendous bang for your buck: this is a powerful, concentrated formula that needs dilution. You mix one part of the Pro-Kleen Green Mould and Algae Remover with four parts of water to get the ideal ratio, which means the 5-liter bottle translates into 25 litres of cleaning power. That’s enough to clean up 200 square metres of fencing, patio, decking, or other hard outdoor surface.

It also has an unlimited shelf life, and protects against regrowth of moss, algae or green mold for up to six months: this means one bottle can last a long time which is great for budget-conscious gardeners.

If you’re on a tight budget, you can apply the Pro-Kleen Green Mould and Algae Remover using a watering can that you already have handy. However, that can be heavy and unwieldy to lug around and manoeuvrer onto your fence, so it’s worth making one more small investment and purchasing a cheap pressure sprayer, it will make the job 100 times easier.

Kingfisher 5L Pump Action Pressure Sprayer

22 new from £7.99
1 used from £ 9.78
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as of August 16, 2022 7:23 pm

The Kingfisher Pump Action Pressure Sprayer is designed to safely disperse garden chemicals including pesticides and herbicides and comes equipped with an extended spray lance to help you spray the Pro-Kleen Green Mould and Algae Remover in hard-to-reach places – for example, against fences.

The pressure sprayer also has other safety-related benefits: it’s made from frost resistant and shatter-proof material, and comes equipped with a pressure release valve. All-in-all, it’s a great, cost-effective way to really help you maximize your speed and efficiency when it comes to product application.

How-To: Step By Step

To use the Pro-Kleen Green Mould and Algae Remover in conjunction with the pressure sprayer, just follow these simple steps:

  1. Mix one part of the Pro-Kleen Green Mould and Algae Remover with four parts of water in the carrying tank for the pressure sprayer.
  2. Apply the Pro-Kleen Green Mould and Algae Remover solution to the fence using the extended spray lance, being sure to apply with extra care to heavily soiled areas and in all the nooks and crannies and corners. Make sure to apply it when there is no rain forecast, as that can reduce the efficacy of the cleaning solution.
  3. Once you’re done spraying – just walk away! It really is as simple as that.
  4. Within the next 2 or 3 days you should be able to see results in the form of green mould, algae, or moss turning orange or brown. If there are areas that are still green, go ahead and reapply the treatment on these stubborn spots.
  5. Once the algae or moss has changed color, simply use a cleaning brush to buff away the dried, dead plant matter!

Frequently Asked Questions

Still have some questions or concerns about how to get rid of moss and algae on your fence? Check out some of our frequently asked questions below:

Can you use Pro-Kleen Green Mould and Algae Remover on stained or painted fences?

Pro-Kleen Green Mould and Algae Remover should be fine for most stained and painted fences: however, it’s always best to test the product first in an inconspicuous place to ensure that your particular paint is colorfast.

Can you paint or stain a fence after using Pro-Kleen Green Mould and Algae Remover?

Yes, you can paint a stain after using Pro-Kleen Green Mould and Algae Remover: however, it is recommended that you wait at least two weeks before painting a treated fence.

Does Pro-Kleen Green Mould and Algae Remover kill lichen as well?

Pro-Kleen Green Mould and Algae Remover does not necessarily kill all forms of lichen: it’s a trial and error situation on that front.

Do you need to wash off the cleaner after use?

Typically a quick rinse with a garden hose will be enough to rinse away any detritus from dead mould, moss, or algae. You can also use a cleaning brush to buff away any remaining orange or brown dust left over.

Will this product kill grass or plants?

Unfortunately, yes: the ingredients in the Pro-Kleen Green Mould and Algae Remover that dispatch mould, algae, and moss is also harmful to grass and other garden plants you’re trying to cultivate. Be careful not to overspray when treating your stained fence.

Can you use a pressure washer to clean your fence?

As we alluded to above, while it might be tempting to reach for your trusty pressure washer to clean your fence, it’s actually not a great idea. Pressure washers are actually too powerful. Instead of just cleaning off algae and moss, they can also strip away paint and stain. Worse, it can damage wood and make wooden fences wear out faster and become structurally unsound.

What may seem like a time saver can actually be quite disastrous. A pressure sprayer has a much more appropriate level of force when it comes to applying any cleaner. There’s nothing inherently wrong with pressure washers: they’re just too much tool for the job. It’s like trying to cut a steak with a chainsaw: it’s messy and it’s overkill.

How To Stop Green Stuff Growing On A Fence

Now that you’ve gotten your fence nice and clean, you want to keep it that way, right? There’s an old saying that prevention is the best cure: this just means that taking steps to prevent a problem from occurring is easier than trying to fix it once it’s already happened.

One way you can safeguard your fence from future invasions of algae or moss is to treat it and for that we suggest you use:

Cuprinol 5L Spray Fence Treatment Autumn Gold

10 new from £15.56
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as of August 16, 2022 7:23 pm

This product doesn’t come standard with a sprayer. However there’s nothing stopping you using the same one you buy to apply your fence cleaner with the fence treatment solution. Alternatively you can purchase the Cuprinol MPSB 2-in-1 Sprayer separately.

Cuprinol MPSB 2-in-1 Shed & Fence Paint Sprayer

17 new from £32.67
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as of August 16, 2022 7:23 pm

While we’re all about saving money, we happen to think the Cuprinol MPSB 2-in-1 Sprayer is worth the investment. Time is money, and you’ll save a ton of time by spraying the fence rather than having to paint the product on by hand so you’ll still come out ahead of the game.

So what makes this treatment product so important to use? It essentially adds a professional finish to your fence in one simple coat. Leaving your garden wood untreated causes it to fade and degrade in the elements, and makes it a prime breeding ground for algae, moss, and green mould. It can both protect your fence from future damage, and add some life and lustre to an already-worn fence.

How-To: Step By Step

This product is so ridiculously easy to use, it’s almost difficult to write a step by step guide, but we’re giving it a try anyway:

  1. Fill the any sprayer with the Cuprinol One Coat Sprayable Fence Treatment solution.
  2. Use the nozzle to spray a thin stream of Cuprinol One Coat Sprayable Fence Treatment over the fence panels. The nozzle will allow you to navigate to difficult-to-reach places and quickly cover large areas: a fence panel should only take 3-4 minutes to apply. One coat is all you need.
  3. You’re done! Be sure to flush the sprayer out with water afterwards, and then kick back and enjoy all your extra free time by soaking up some sun in your garden.

A lot of times, your fence is the first thing a person will see when they arrive at your home. The impact a clean, new looking fence can have is substantial. If you then protect your fence from future invasions by treating it you’ll enjoy that look all year round and you’ll prolong the life of your fence indefinitely.

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