Sounds like it is tropical, they are perennial also if they don't get frozen. Hardy have a more plain leaf than the tropical hibiscus does. Tropical also have many that are double flowers and mostly a smaller flower. Tropical leaves are more glossy than most hardy hibiscus, and hardy can take a lot more than a 20 degree farenheit. Tropical are fast growers over 8' tall if allowed. It can be pruned back up to 3 or 4 times in a summer to maintain the growth and for better blooming throughout the summer.

Wally, Thanks for the input. I will put this baby in a pot for sure. One other question! If I leave it on the deck;which gets full sun all day, will it be too much sun? Thanks again for the answer.
Rommy