Posted: 07/05/2016 at 17:06
get rid of whatever membrane you have....awful soil killing and ugly. Membrane should be banned from garden borders
dig over and remove everything you have there. Clean plants thoroughly and pot them up whilst you attend to the sorting out.
a rockery only looks good if done properly....same sort of stone, partially in the soil, and all facing same way. Otherwise re comsider your options Rickh.....what else would you like there? A mound of soil and planted well and subsequently mulched well can look superb