We bought this " old house" three years ago, knowing it had a handsome row of shade trees just to the West. There is a row of seven 100-year-old suger maples that are our source of AC. These venerable trees keep this house cool like no man's bisiness. All the naturall AC you need.

Is there anythingI can do to keep these monsters healthy, green and growing?? I have heard that "tree Rings" are necessary, but A'm I too late for that? Any sugguestions to keep the old sugar maples growing well? How do you keep your old trees well ?