Easy Does it reaches 6 ft. high in my zone 7a (central Maryland) garden. And that's with cutting it down to 2 ft. in the spring, and very moderate fertilization with fish emulsion.

Also, I would class the fragrance as strong rather than moderate -- in fact the scent is unbelievable. I have this in my front yard, and everyone who passes by on the sidewalk swoons. Sometimes i look out the window and there's a little group of people standing around the plant.