How to Remove Lichen from Your Wood Fence — A Texas Homeowner's Guide

Noticing green, crusty patches on your beautiful wood fence? That's lichen—a combination of algae and fungus that thrives in humid environments. While it might look harmless, leaving it untreated can trap moisture against the wood, accelerating rot and reducing the lifespan of your fence.

Step 1: Gentle Scraping

Use a plastic putty knife or a stiff-bristled brush (avoid wire brushes, which can damage the wood fibers) to gently scrape off the top layer of the lichen. Do this when the fence is dry to avoid gouging soft, wet wood.

Step 2: Apply a Cleaning Solution

You can use a commercial wood cleaner or mix a simple DIY solution: one part white vinegar to one part water. Spray the solution generously over the affected areas and let it sit for 15-20 minutes to break down the remaining lichen roots.

Step 3: Scrub and Rinse

Scrub the area again with your stiff brush, then rinse thoroughly with a garden hose. Avoid using a high-pressure power washer close to the wood, as this can splinter cedar and pine.

Step 4: Prevent Future Growth

Once the fence is completely dry (usually after 24-48 hours), apply a high-quality, penetrating wood stain or sealant. This creates a moisture barrier that makes it much harder for lichen and algae to take hold in the future.