Garden and cleaning fans have been raving about a fence-cleaning product that could remove algae from wooden garden fences in hours, with customers reporting it keeps fences algae-free for up to seven years.
08:26, 06 May 2026Updated 07:20, 08 May 2026
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Remove green stains from fences with ‘best on the market’ cleaning product gardeners love(Image: Cherdchanok Treevanchai via Getty Images)
Garden fences provide the ideal breeding ground for algae to flourish. When rainfall hits, or even after watering plants close to the fence, the porous timber creates a moist environment for algae to take hold. It continues to spread in shaded spots where sunlight cannot penetrate, preventing the wood from ever fully drying out. This is precisely why algae tends to appear on just one side of your garden fence.
These unsightly green stains can turn a once-immaculate wooden fence into a slippery, shabby eyesore that not only destroys its appearance but can also cause serious structural damage.
By locking moisture into the wood, algae speeds up rot and gradually weakens your garden fence, making regular upkeep absolutely vital.
While natural and household cleaning remedies such as white vinegar, washing-up liquid or pressure washers can tackle the problem, they don’t always prove reliable in keeping algae at bay over a prolonged period.
Garden fences provide the perfect surface for algae to thrive(Image: Katrin Ray Shumakov via Getty Images)
For those seeking a longer-lasting solution to rid their fence of algae or moss build-up, garden enthusiasts have been raving about the Wet & Forget Mould, Lichen & Algae Remover, currently available on Amazon for £26.99, reduced from £35.99, for a five-litre bottle.
One satisfied customer commented, “The green algae on our wooden fence slats went almost instantly. It looks really good now. Was worried about the effect on nearby grass, but this seems less damaging than other chemicals we have used in the past.
“The slats now look much better. Really effective and long-lasting. This should prevent us from having to paint the fence this year.”
A further reviewer remarked: “So easy to use and with such minimal effort, the algae on my fence has gone! Over the years, I have used so many different products, all promising the same thing and none delivering, so I was sceptical about this, even though the reviews were generally good.
“It was good on my patio, but it was game-changing on my fence! Used a spray pump canister and just one layer of spray on the fence panels has removed all the algae. Amazed! Highly recommend!”
A third customer wrote: “This is amazing stuff! After all the rain we’ve had. The patio and paths had turned green. Used this and could see it working within a few hours. Two days later, and everywhere clear! Like a new patio and path had been laid. So, I tried it on the wood fence, gate and raised bed wood… another amazing result! The only things that should be green in a garden are plants and grass, and now that’s what we have!”
A fourth enthusiastically stated, “This product is the best on the market and worth the cost. My fences have looked great for years with a treatment every seven years or so. Plus, unlike high-pressure cleaning, it doesn’t remove the pine wood treatment, meaning it is clean but not exposed to termite damage.”
One drawback noted by some buyers is that the product struggled to fully eliminate lichen stains from patios.
The product description states: “Designed for hassle-free application, Wet & Forget works over time to clean and protect your surfaces – no scrubbing, rinsing, or jet-washing required.
“Ideal for almost all external surfaces, making it perfect as a fence cleaner, patio cleaner, block paving cleaner, Indian sandstone cleaner, solar panel cleaner and driveway cleaner.”
Alternatively, smaller two-litre bottles of Wet & Forget Mould, Lichen & Algae Remover are available from B&Q for £18 and at Wickes for the same price.
There are further algae removal solutions on the market that perform well on garden fences, including the Pro-Kleen Patio Cleaner, available on Amazon for £14.90 for a five-litre bottle, and the Scrubb Algae Remover, priced at £19.99 at ToolStation for a five-litre bottle.
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