If a Rhodendron bush is 25 ft. elevated; approximately how older is it? Just bought this house in Cleveland, OH, and the bush out...

Just bought this house in Cleveland, OH, and the bush out front is immense. It seems to be several bushes, reach above the 2nd floor, and is about 35 ft. wide-ranging. I'm curious to know how old it is; appreciation.
How do i no my garden is south...
Answers:    Rhoddies do tend to grow tall when growing against a wall. From the dimensions you bequeath I would estimate them to be 25 to 30yrs old.
Is the canadian maple tree an evergreen?