The invention relates to a type of border made of mortar or concrete with an L-shaped return. This device is indicated particularly for delimiting grassy and lawn areas while making possible the passage of the wheels of lawn mowers and avoiding the use of other equipment. This border consists of a horizontal part (4) placed on the ground and of a vertical part (1) above the ground with the possibility of different patterns. The internal angle (2) is reinforced with a quarter round. <IMAGE>
