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.
Rose of Sharon Tree. Rose of Sharon Tree Facts. Rose of Sharon belongs to the mallow family, Malvaceae and grows well in Zones 5-8. It will reach heights of 12â and may grow 6-10â wide. It requires full sun and prefers moist, fertile, well-drained soil that is high in organic matter but adapts well to many pH levels.