We got this hibiscus for our 29th wedding anniversary on May 29, 2011. It has bloomed daily since, many times having five or six large blooms. Even with the temperatures getting down to 42º F at night, it is still blooming and still has a lot of buds.
We will cut it back and bring inside,soon. They are supposed to winter over inside from October to March in zones colder that 9 and 10 (we are zone 6 where we are). From the various guides to hibiscus I perused, they are supposed survive light frost, but I’m not sure light frost at nearly sea level is the same as light frost at 5000 feet. However, they are apparently fairly hardy for tropical plants.