This was aiming for "Conifer" forums, but I'm a newbie so it's just "there" in "how to use". I just purchased a home with a rather large redwood tree. The former owner dumped about a foot of concrete rubble and gravel all around the tree to form an RV parking spot about 5 years ago. The tree currently has very little new growth on it. It's a pitiful skeleton with just wisps of green at the end of the branches. I fear it's too late to save it, but would like to know if there's a chance. I am currently removing as much of the rubble/gravel as I can, and was thinking maybe a boatload of fertilizer and new soil might give it a chance. Any suggestions?