plants are divided into two main categories, the tropical
flowering hibiscus and the hardy flowering hibiscus family.
The tropical hibiscus is not winter hardy in areas outside
of climates such as the state of Florida. The Hardy Hibiscus
is reliably hardy in zone 4 and, with extra protection, marginally
hardy in zone 3. Hardy hibiscus can be grown and enjoyed as
far north as Minnesota and New York.
hibiscus need very little care over the winter; they are root
hardy to about zone 5 with no protection. They die back to
the ground each year. Hardy hibiscus grow very quickly once
they break ground in late spring.