I'm still weighing out the options for finishing the outer edge of the rock trench. The cheapest, and simplest, is the rolls of black plastic landscape edging. Right now, that seems to make the most sense for performance, ease of installation (although it IS a bit of PIMA to put in), and economy. Dski kinda wants landscape timbers. I'm remaining open to ideas since I have a couple of weeks before we will likely get to that point.
