Why Is My Outdoor Wood Furniture Turning Black?

Outdoor wood furniture is often subjected to the elements, including rain and humidity, which can cause the wood to turn black. This discoloration is a result of mold or mildew growth on the wood. The presence of moisture makes it more likely for mold and mildew to form on outdoor wood furniture, and if left untreated, can lead to further damage.

What Causes Mold and Mildew Growth?

Mold and mildew growth are caused by microscopic fungi that feed on organic materials such as wood. They thrive in damp environments with little or no sunlight.

When they find a suitable environment, they spread quickly, forming a black discoloration on the surface of the wood. If left unchecked, mold and mildew can spread throughout the entire piece of furniture.

How Can I Prevent My Outdoor Wood Furniture from Turning Black?

To prevent outdoor wood furniture from turning black due to mold or mildew growth, it’s important to keep the wood dry. After each use, you should wipe off any moisture from the surface with a soft cloth. If you live in an area with high humidity levels, you should also cover your outdoor furniture when not in use to protect it from dampness.

It’s also important to clean your outdoor wood furniture regularly with an appropriate cleaner that is specifically designed for use on wooden surfaces. This will help prevent mold and mildew from forming in the first place by removing any food sources such as dirt and debris that could attract fungi.


Mold and mildew growth are the main causes of outdoor wood furniture turning black.

To prevent this discoloration, it’s important to keep the furniture dry and clean regularly using an appropriate cleaner specifically designed for wooden surfaces. By following these tips you can help ensure your outdoor wood furniture stays looking its best for many years to come.

Photo of author

Chris Powell