I have several shrubs that are growing together to make a giant multi-cultural mega shrub. Do I try to remove the ones that are being buried by faster growing ones, and re-plant them elsewhere? Do I try to cut all of them back into their own individual shape and make them look separated again (not sure if this is possible)? They are two or three different species that looked great together, but are now just merging into the one mass. At least they are successfully blocking out weeds in my beds.