I bet these could be made w/ some concrete and a homemade mold using old fence planks... I also like the natural look of just using old pallet planks or fence planks laid out in the same manner. garden, untitled, by Maureen Anne on flickr
This densely planted border is a riot of color. What I admire about this planting is not the color combinations exactly, but the cultural practices that have made this border explode. No room for weeds in this garden border.