Closely related to edging is mulching. We know we should mulch to suppress weeds and conserve water, but mulch also serves an esthetic purpose. If the color combination of dark soil and green leaves can make an impact with an edge, why not bring that impact throughout your garden? The darker the mulch, the more your plants will stand out. The shredded cedar mulch is a fine choice in general, for a mulch, but the pale rusty color doesn't do much to enhance the golden leaves of the hakonechloa grass.