The block has a base (1), with two lateral walls (2) extending upwardly from it at each side. At least one end wall (3) is also formed integrally with the block, for positioning at the front of the assembly. The base has at least one opening (4). At least one of the lateral walls includes attachment formations (7) in its upper portion, e.g. openings to receive a connector (8) extending through the base opening of a superposed block. USE - Construction of retaining wall including positions for planting.
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