Cold Damage to Cactus

I have a very six foot tall cactus (Euphorbia Tree) that normally thrives in our sunroom.  We had several very cold days and it got much too cold in that non-insulated room.  All of the new growth on the cactus has either shriveled or turned light greenish-yellow and is droopy.  What can I do to revive it?

If the damaged areas continue to deteriorate or show no signs of improvement it is time to do some pruning.  Remove the dead portions back to a healthy stem.  If older parts of the plant are firm and normal color there is a good chance the plant will survive and eventually produce new growth.  Prevent future cold damage and continue to give it proper care and time to recover.

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