I live on Long Island Zone 7 and interested in using ground cover instead of mulch. My property while not large a lot of garden beds two of which are slopes that haven't proved ideal for mulch given rain run off. I find bulk mulch to be poor quality. I want to switch to using a ground cover. I have varying sunlight exposure in various beds so it may require me to put in different types of cover but I worry about invasiveness of the cover. Will it invade my grass? I have considered the following
Creeping thyme
Creeping Phlox
Sedum tiles
Are these good choices? If not can you suggest any other covers?