terms u201c a u201d and u201c an u201d as used herein do not denote a limitation of quantity but rather denote the presence of at least one 1 of the referenced items finally any directional signal such as top bottom left right upper and lower are take with reference to the orientation shown in fig1 and 5 a the preferred embodiment of the present invention is a curved preformed landscape barrier 10 while an alternative embodiment is a straight assembly embodiment 200 landscape barrier the landscape barrier 10 includes a carrier plate 40 which supports generally flat interconnecting curved elements which are described in more detail subsequently while the straight assembly embodiment 200 has straight elements the landscape barrier 10 and the straight assembly embodiment 200 can be freely arranged to form a decorative retaining barrier around trees 100 flower beds driveways walkways and other similar locations refer now to fig1 and 2 respectively front perspective and sectional views of the landscape barrier 10 the landscape barrier 10 is shown providing an assembly of interlocking members having matching radii the landscape barrier 10 includes a plurality of curved wall elements 20 a plurality of curved cap elements 22 and a carrier plate 40 the curved wall elements 20 and curved cap elements 22 are envisioned as being made of molded high density polystyrene molded or extruded plastic or equivalent light weight material the tiers of curved wall elements 20 are preferably arranged horizontally offset to overlap subjacent and superjacent tiers each curved wall element 20 and each curved cap element 22.