We had one freeze and I think my hibiscus froze. . . . how do I know if it will come back in the spring or if it is dead clear down to the roots?
Hibiscus Winter Care
Certified GKH Gardening Expert
As long as the stems are still alive, it will come back. This article will help you with caring for it with the damage: https://www.gardeningknowhow.com/plant-problems/environmental/tips-for-saving-cold-damaged-plants.htm
This article should setermine if the plant is still alive: https://www.gardeningknowhow.com/plant-problems/environmental/how-to-tell-if-a-plant-is-dead-and-how-to-recover-an-almost-dead-plant.htm