[header] How to remove mildew and algae from a wooden fence [title] Trim and tie back plants. [title] Cover tender plants with a tarp or invert buckets over them. [step] Remove any other obstructions. 
[title] Set the power washer on a lower pressure setting such as 1500 to 2000 psi. [title] Stand about 2 feet (0.6 m) away from the fence and hose it down.