The following photos were the result of a couple of hours spent adding rocks to simulate a typical moorland type granite hedge. The stones are coloured filler/PVA mix spread out to dry on foil then broken up by hand and pressed into the gloop. Static grass was added with a puffer and some scatter and foam added by hand.
I'm pleased with the stonework and from a distance the vegetation looks reasonable but the close-ups show the grass is not ideal. When it eventually dries I may clean it off a bit with a toothbrush and then apply rough grass (carpet underlay and/or plumbers hemp), bushes (a la Gravett) and static grass (properly).