The day before the expected first freeze of the season, I watered all the plants in my container garden deeply, to keep them warm through the possible freezing night.  I was most concerned about my lettuce, which makes wonderful salads.  After brainstorming with a friend, I retrieved two panes left from an old storm door that had been sitting the back yard since forever.  With a little duct tape, I managed an a-frame greenhouse arrangement over the bed. When I checked the lettuce this morning, it was still perky and actually felt a bit warmer to the touch than the other, uncovered greens.  Of course, I expect the mustard, kale and chard to weather the freezing temperatures well.  I have had chard covered in ice which I watered and it came back.  In fact, I have had a chard plant last 2.5 years before I became tired of it in the spot and took it out!  I’ve heard of one lady who had a plant that was 5 years old.  So the lesson is, plant chard where you want it to thrive for a while and keep it watered.