The hibiscus in question is not winter hardy. It is a tropical hibiscus. In fact, on the enclosed card it says cold hardiness is only to 30 - 40 degrees for a low temperature. Move it indoors or to a protected spot for the winter. Some are deeply cut.
Tropical types are glossy and smooth.
The flowers are larger, but more one-dimensional than the tropicals. Tropicals typically have very detailed, showy but smaller blooms. I have three hibiscus plants that I have taken inside and am wondering if I am taking care of them properly. I am watering them every other day, and I fertilized them about three weeks ago. They are in a west window, which is the best I can do as far as sunlight is concerned.