How to remove green algae from wooden garden furniture

Green algae on wooden garden furniture can be removed effectively using a product specifically developed for this purpose. We offer green algae remover solutions in concentrate form and as ready‑to‑use products, which tackle algae growth and protect against new deposits for many months. You may find online tips about home remedies such as mixtures of water with white vinegar, lemon juice or soft soap, but we advise against using these — green algae control falls under biocide legislation and, as an authorised holder, we recommend only legally approved products. Green algae is caused by moisture, lack of sunlight, dirt and insufficient maintenance. Regular cleaning, protection and dry storage help prevent future algae growth.

HG solutions for removing green algae from wooden garden furniture

To effectively remove green algae from your wooden garden furniture, we offer the following solutions:

• HG algae and mould remover concentrate: Available in two sizes. The 500 ml treats approximately 200 m² and the 1 litre treats approximately 100 m² at the curative dosage. Dilute 1 litre of product with 20 litres of water and apply during dry weather by spraying, pouring or brushing. After several days, remove the dead algae by rinsing or scrubbing. A follow‑up treatment helps prevent regrowth for many months. When diluted, the product has no harmful effect on grass and plants.
• HG algae and mould remover ready‑to‑use: A ready‑mixed product for quick and easy treatment of patios, balconies and other outdoor surfaces. Apply to the dry surface during dry weather by pouring it over the area. Scrubbing or rinsing is not required. Results become visible after approximately 36 hours and the product is suitable for all surfaces, covering between 25 and 50 m².

For more information about removing green algae from wood, please visit the following pages:

• How to remove green algae deposits

Solutions for green algae on wooden garden furniture

When searching online for solutions, various household remedies are often suggested. We strongly advise against these due to legislation and inconsistent results. However, the most common suggestions include:

• A mixture of equal parts water and white vinegar, applied and scrubbed after a short working time. This method has no proven safe effect on wood and may cause damage.
• A paste of lemon juice and salt, applied and left to work before rinsing. Lemon juice can slightly bleach the wood and affect its appearance.
• A mixture of water and liquid soft soap applied and scrubbed. Results vary significantly and effectiveness is uncertain.

Always follow the manufacturer's maintenance instructions. If in doubt, choose a product specifically developed and legally approved for algae control. We advise caution with the methods mentioned above and if in doubt, always choose a legally approved product specifically developed for green algae control.

Causes of green algae on wooden garden furniture

Green algae formation is influenced by several factors:

• Moisture: Prolonged damp conditions encourage algae growth
• Lack of sunlight: Slower drying increases the risk
• Dirt and organic material: Accumulation promotes development
• Insufficient maintenance: Allows moisture and dirt to persist

To help prevent algae growth, place furniture in a well‑ventilated, sunny area where possible, clean regularly with suitable products, apply protective treatments to reduce water absorption, and store or cover furniture during prolonged wet conditions. Position your garden furniture in a sunny, well-ventilated spot where possible to reduce moisture and speed up the drying process. Clean your garden furniture regularly with a mild cleaner and a soft brush to remove dirt and organic material. Treat your wooden garden furniture periodically with a special protective product to make it water-repellent and slow algae growth.