I stopped by this morning and all of their trees look fine. One is covered in dead leaves but the stems are still green all the way to the top of the tree. The other two are covered with green stems and leaves but it looks like there are fewer leaves than during the summer. I will take some photos when spring really happens (we are supposed to dip down into the mid 20's tonight). At home I have one Poncirus trifoliata in the ground that is unscathed by winter, it is now in full bloom; two hybrids one of which is older and larger and it now looks dead, the other looks fine but slightly damaged by the past two winters. They are sheltered by my garage so they don't get any of the cold winter wind.