Simple and 'magic' way to remove green algae from wooden fences and patios

Picture of algae covered fence
-Credit: (Image: (Image: Getty))


With the arrival of summer, most folks are relishing their time out in the open. However, your garden view may be marred if your fence is laden with unappealing green algae.

Wooden fences, patios, and decking are often coated with algae film, mould, and mildew following heavy rain in your vicinity, as moisture provides an optimal environment for its proliferation. It's essential to clean it off swiftly in order to prevent wood rot.

Though it can be rather inconvenient and pricey to have a fence replaced, rotting wood on a patio or deck poses a far greater risk, hence the importance of keeping these areas clean.

Brian Bayse from Decks and Docks, a specialist in the area, commented: "While green algae on a deck may not be aesthetically pleasing, its presence on your wood deck can pose significant hazards."

He added: "It's crucial to understand the importance of promptly removing algae to prevent potential damage and ensure the safety of your outdoor space.", reports the Express.

Now, onto tips on how to eradicate green algae from wood.

In the quest to keep your garden clean, there's no need to splurge on expensive cleaning agents or potent chemical cleaners. A simple yet effective remedy for algae removal could already be sitting in your pantry.

One of the most successful methods for tackling algae is utilising white vinegar. Its acidic nature and antifungal properties make it safe for surfaces while still being effective at breaking down bacteria.

Moreover, vinegar acts as a solvent, capable of breaking down organic matter such as algae and mould, thus simplifying the process of wiping it off.

Brain stated: "White vinegar is a popular natural cleaner that can be used both inside and outside."

"Simply combine one gallon of water with one cup of white vinegar and scrub the deck with the solution to remove algae, mould, and mildew."

All you need to do is blend the vinegar and hot water and apply it to the area affected by algae. If you're cleaning a fence, a spray bottle might make the process easier.

Allow the vinegar mixture to soak into the wood for 15 to 30 minutes, giving the acid time to dissolve the algae.

Use a broom or bristle brush to briskly scrub the area, and the algae should come off easily since it has been treated with vinegar.

Rinse the wooden area thoroughly with clean water to eliminate any remaining algae residue, and you should have a sparkling clean deck, patio or fence free from green slime.

In Britain, due to our frequent rainfall, algae and mould are likely to be an issue, but their growth can be prevented by keeping wooden areas in your garden clean and using water-repellant paint to ward off moisture and bacteria build-up.

Brain added: "Unfortunately, there is no magic spell to cast on your deck to prevent algae growth, but there are some measures that can be taken to slow or prevent it."

"The first is cleaning annually or biannually. Algae spreads quickly, so the longer you allow it to build up, the more it grows."

"This is why it is important to have a regular cleaning schedule. It's also a good idea to seal your deck with a quality water repellant. Algae needs moisture or standing water to grow, so keeping your deck dry is key."