We are going to be experience a freeze (much earlier than usual). i am wondering if I need to get my carrots/beets/onions & potatoes out of the ground. Temps are getting down to -10C or 14F overnight for 4 nights straight. It should warm up after that, but who knows. We should be around -1C or 30F right now, I usually have lots of time to harvest, have never had to worry about this.