Hibiscus rosa-sinensis, known colloquially as Chinese hibiscus, China rose, Hawaiian hibiscus, rose mallow and shoeblackplant, is a species of tropical hibiscus, a flowering plant in the Hibisceae group of the family Malvaceae. The biggest difference between tropical and hardy hibiscus is that tropical hibiscus is not hardy in zones lower than zone 9. Tropical hibiscus does not tolerate freezing temperatures and cannot survive more than brief periods of cold.
The other morning I went outside shortly after sunrise. My two yellow tropical hibiscus had multiple flowers. Hibiscus are made to flower, and mine always try when they have sun and water. We have a mild winter with only occasional freezes. It’s been over 5 years since I lost tropical plants to frost.