Millet, my poncirus and flying dragon trees don’t get any protection in winter. Neither do my Dunstan or 80-5. This past winter was mild and I didn’t protect citradia or Thomasville and citradia only lost a few feet of last year’s growth and Thomasville cut in half. I didn’t protect my 15 foot tall Changsha on own roots and it died down to three feet tall, but now growing back hard to five feet. They wouldn’t have been damaged at all if I didn’t get down to 14 degrees in mid March after a prolonged warming in February.