You can maintain a retaining wall stone by checking on it regularly to make sure that the soil behind it is level and compact. You may need to add more soil or remove some soil as needed to keep the wall in good condition. Additionally, you can use a weed barrier fabric behind the wall to help keep weeds from growing and damaging the wall.

You can maintain a retaining wall stone by periodically applying an sealant. This will help to protect the stone from weathering and staining. Additionally, you can clear away any debris or vegetation that may have built up around the wall, and you can re-point any stones that have shifted or fallen out of place.