no by rock garden i mean a garden enclosed by rocks (my own personal colection)[b said:Quote[/b] (Tony Paroubek @ Sep. 27 2005,1:12)]Rock garden? When I think of rock garden I think of aridish sandy well drained soils sloping landscape and big boulders etc. Not a very friendly habitat to CP's.
Unless your rock garden is in the middle of a sphagnum peat bog I wouldn't worry about plants becoming invasive.
I hope you didn't really mean rock garden though!