On 1 Jun, 22:07, platypusgra wrote:
Can any one help I have a large rockery with some lovely alpines and
heathers. I am forever pulling the couch grass out by hand and short
of digging out all my rockery I can not seem to find any chemical to
just kill grass at the shops. All the chemicals in the seem to just
kill anything green or weeds in the lawn. I am looking for something
to be selective just for grass. I dont like using chemicals if I can
help it but it seems the only option?

I'm no expert on rockery - but how did you managed to get couch grass
in there?! Didn't you lay some gravel then your rocks and soil? If it
came with the soil you'd seen it. Are you sure it's couch grass? Can
you send in a picture?