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.
Desert rose is a slow grower with maximum observed heights of about 6 feet in South Florida but usually much smaller. Sap flows from broken stem of A. obesum Sap flows from severed leaf A. obesum This plant is approximately 35 years old and measures 6 feet high and 10 feet wide, Fort Myers, early April.void planting desert rose in areas where automatic sprinklers are located. Fertilization and Irrigation: The plant is a slow grower if not generously watered and fertilized. With-out fertilization the plant may grow as little as 6 feet in 15 year. The plant has its fastest growth in the first 3 to 5 years.