The answer to 'how often to retaining wall' is that most retaining walls need to be inspected and maintained every 1-2 years. Properly constructed retaining walls can last 20-50 years, but they require regular upkeep to ensure they remain stable and safe. This includes checking for cracks, leaning, or other signs of wear and tear, and making any necessary repairs.
Retaining walls are an important part of many landscaping projects, helping to prevent soil erosion and provide level ground for gardens, patios, and other features. However, they do require ongoing attention to function properly over the long term. Homeowners should plan to visually inspect their retaining walls at least once a year, and consider hiring a professional landscaper or contractor to perform a more thorough inspection every 2-3 years.