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.
The rose plant family (Rosaceae) includes fruiting and flowering peach, almond, plum and cherry trees of the genus Prunus. Cherry tree varieties range naturally through temperate climate zones and into the subtropics, displaying wide variations of fruiting, flowering and growing habit..S. Department of Agriculture plant hardiness zones 5 through 8 support sweet cherry trees (Prunus avium), which require a period of winter chilling. Dozens of commercially available trees bearing sweet, luscious cherries include Bing, Black Tartarian, Stella and Ranier..