How to rescue frostbitten flowers so they can recover
What to do when flowers get frostbitten
Pruning: Prune the frostbitten branches, taking care to cut right from the base of the plant; after pruning, wrap the flower plant with cling film to keep the wounds from being frostbitten again. Keeping warm: Wrap the flower plant with old cloth or sponge, then wrap it again with cling film and secure it, and finally place the plant in a dark, damp place so it can absorb enough moisture, which helps it recover.