Q.My Hibiscus Has Frozen!
I live in NYC and trash-picked a sad hibiscus tree last fall. I gave it a bigger pot, better soil, and some love; and it immediately bloomed. It easily survived last winter and has been happy and healthy since–until now. I keep it in a south-facing window next to a radiator to keep it warm through the freezing winters. However, this year it has almost completely died! All the leaves have fallen off and I don’t know what to do. Is it too late for my poor salvaged tree? Will it ever bloom again?

Certified GKH Gardening Expert
These articles will help you:
https://www.gardeningknowhow.com/plant-problems/environmental/how-to-tell-if-a-plant-is-dead-and-how-to-recover-an-almost-dead-plant.htm
https://www.gardeningknowhow.com/plant-problems/environmental/tips-for-saving-cold-damaged-plants.htm