I aint so sure they wouldnt grow, might get bit a time or two. A few years ago, I didnt get all my taters harvested so they stayed in the ground all winter. When it became spring I had a whole row of taters coming up from that left over row. I just fertilized and hilled them in and they made taters, So I cant say planting at Christmas is optimal, but for certain it can work. Any ways, my taters are in the ground and in a few containers and I am done planting. I have tomatoes I will be transplanting out of their little planter cups this week into larger containers. They wont go outside until end of April. Last frost date is april 29th. I havent checked the calender, but corn, okra and peppers will go in after May 1st. I'll probably start a few more mater and pepper seeds just in the event I lose a few to a late frost. I can always give away extra plants.