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Leaves that fall from trees can be a marvel to behold. But leaves can stain exterior surfaces when they eventually settle on vehicles, concrete driveways, patios and other surfaces, become wet and/or are not cleaned away in a timely fashion. Leaf stains are caused by tannins in the leaves. The pigments can be absorbed by porous materials like concrete and leave stains behind. While these stains may wash away over time, homeowners may prefer a faster way to get rid of unsightly stains. To remove moderate leaf stains, mix oxygen bleach with hot water and apply to stains using a scrub brush.

Dark stains may require a tougher cleanser, such as one that contains trisodium phosphate. Some homeowners find success using a pressure washer to clean away leaf stains, while others rely on commercial leaf-stain removers.