Framed or mounded, raised beds give plant roots the space they need
Gardening in raised beds has been a common practice for centuries. "Raised" means the soil level in the bed is higher than its surrounding, and "bed" implies it is small enough to work from the walkways.
Retaining walls are used for both commercial and residential purposes. They have gained popularity in a short period of time, becoming commonly used for landscaping projects around the home and for commercial landscapes as well.