We planted 9 trees in our garden this year from arbor day. We also bought a few older trees that are about 6 ft tall. With the winter coming, I would like to know if anyone has any tips for preparing them for the cold winter. I'm especially worried about the foot tall trees we got from arbor day in the tree garden. We have mulch down on all of them, but with the leaves freezing/frosting over night now, I need to be ready to make sure they survive.

Any Suggestions?