What are the best methods for repairing spalled areas on stone outdoor tree boxes?

Repairing spalled areas on stone outdoor tree boxes requires a systematic approach to ensure durability and aesthetics. First, clean the damaged area thoroughly by removing loose debris and dirt using a wire brush or pressure washer. Next, apply a bonding adhesive to the exposed surface to enhance adhesion. Use a high-quality patching compound or mortar mix to fill the spalled area, smoothing it evenly with a trowel. Allow the patch to cure completely before applying a stone sealer to protect against future moisture damage. For severe cases, consider consulting a professional mason to assess structural integrity. Regular maintenance, such as resealing every few years, can prevent further spalling and extend the life of your stone tree boxes.