I have many of these and have been researching the name to find out how big they grow. Many are now around 1 1/2 feet wide. I need to know for it makes a difference as to what I plant between them. They live very well on a rocky hard-as-concrete slope. I also wish I could find something else that will grow as well on this slope (that the gophers and deer don't eat or a freeze doesn't kill!) Thank you so much for any information. I
