My Crassula ovata 'Gollum' has undergone all sorts of cold weather issues. Just showing here how mine reacts to cold weather:
Photo taken last Feb 2012 - looked almost dead
I thought it is surviving this winter much better: have placed it nearer to the house.
Photo taken on 08Jan2013
This photo taken this morning:04Feb2013. Don't know if this is a delayed reaction to the chill it got a couple of weeks ago when we had almost two weeks of 28F-30F overnights. Just surprised to see how the other half of the plant has bowed down, somewhow like a windswept look.. I felt the trunk, it still feels quite firm, just this sudden bowing down
Leaves looks very green and has outlines of red. It has not rained here much, been getting good 65F daytime and about low 30's overnight.
Hoping it will upright itself, like the way this Mother of Millions is slowly raising the tip, after the stem bent back: