Hazel I had another one just like that one and it grew for about 4 years and then it just died. I have planted about 3 more in its place and 2 had died and the other one is just starting to grow. It is not as big as the one I posted but when it blooms I will post a picture.
I don't know what Winston does but every plant she has grows big.
I fertilize in the Spring, August and Fall. Don't know where I heard that from but it seems to work. And yes they like their roots protected. I planted Chicks and hens around mine. I will have to see if they are still there.