I am very disappointed in the performance of a plant protection bag I bought to prevent just this. This is…was… a lychee tree. I bagged it well in advance of the freezing weather and was checking the soil often to make sure it wasn’t drying out. It didn’t not help the plant at all and all of the leaves dried brown.
There is some hope though, the tree is sprouting back from the base. However, I don’t know if this was a grafted variety or not! The leaves are a lychee at least from what I can tell. I think I may end up planting this in the ground and seeing if it can survive on its own….