I went into the back of my garage to check on my pots when I saw a bucket with about a dozen 2’ cuttings of an unknown that did not get into the refrigerator.
They were in about a foot of water that I know must; have frozen. My garage is unheated and I know in Dec. that I had some vegetables in a basket that froze solid.
I find that the bottom of these cuttings are hollow for about 6” than the center appears the same as what were kept in the crisper The cuttings with tips are still green and do not show signs of freezing. I have made 6” cuttings and planted them we will see if they set roots.
z 6 New Jersey