I live in western Pennsylvania. Last year I noticed some creeping Charley in a few places of the back yard. I'd pull it up every chance I'd get. We get a lot of rain and temperatures have gone up and down. My garden is now covered in thich mounds of creeping Charley! It's also in areas of the yard. How do I get rid of it and still be able to grow a garden??? We have 2 small dogs.