Question
the top of my fica tree has been frostbit , what should i do about it , if anything

Answer
Neil,

How did just the top of your ficus tree get frostbite? I would not do anything for awhile. Wait at least 2 months then it will be easy to tell what parts are dead and what is leafing back out. If it was a mild frost it may all come back, they are pretty hardy. At that point the dead parts can be clipped off with sharp pruning shears. If you have more questions feel free to write again. Good luck.

Darlene