The answer to 'best time for retaining wall' is the spring or fall seasons are typically the best times to build a retaining wall. The cooler, drier weather during these seasons allows for optimal soil conditions and easier installation. Avoid the hot, dry summer months or freezing winter weather, as they can make the construction process more challenging.
Additionally, building a retaining wall in the spring or fall allows the soil and plants to have time to settle and establish themselves before the harsh weather of summer or winter arrives. This helps ensure the long-term stability and durability of the retaining wall.