Though invented by Lovecraft in 1928 [needs confirmation], the name Cthulhu is probably derived from the Classic Greek word chthonic meaning subterranean, as apparently suggested by Lovecraft himself at the end of his 1923 tale The Rats in the Walls.
They're listed as a zone 5-9 plant but as a member of the hibiscus family, Rose of Sharon naturally prefers a warm climate. As a living fence, which is what you really want, you'll be much better off with some kind of evergreen. Juniper, spruce, pine, fir, there are many sizes and varieties to choose from.
Colorful, showy flowers appear in summer in shades of white, red, pink and purple on the rose of Sharon bush. Growing rose of Sharon is an easy and effective way to add long lasting summer color with little fuss. The large, showy flowers attract birds, butterflies and other useful pollinators.