Nutmeg - very pretty! I think that your Asiatic Lilly might actually be an Oriental Lilly (judging by the flower color and the shape of the leaves). Is it scented? If so, it's an Oriental.
KimKanQuilt - as QuiltE said, there is a tropical Hibiscus and a perennial Hibiscus. Many of the perennial Hibiscus are hardy all the way up to USDA zone 4. Perhaps you have a colder variety that is not getting the necessary cold/dormant period it requires, or you have a tropical variety that is not enjoying the winters (even in SoCal).