Posted: 11/09/2015 at 18:38
I have used the cheap naff log roll edging, you can't see it, it's sunk in to ground level, the grass is cut up to it and the gap behind filled in, not the cliff edge look. The plants are allowed to spill out,over the grass. Only thing now, it's been in almost four years and some is rotting away.
it serves the purpose of grass not growing in the borders.