I have seen 10 ft Tea Olive hedges in Commerce GA, at a business called The Pottery. I was looking around for that telltale fragrance and couldn't believe it was the shrubs towering over me. My own tea olives are about 6ft tall. I've only trimmed them once in 20 yrs, they needed filling in, they were too leggy. Thanks for the info Mary that was more than I ever knew about them.