Evergreens in pots--thru winter?
I'd like to add some greenery to the area in front of my coffee shop (all sidewalk). But I want something taller than most flowers. Could I plant some type of evergreen--an arborvitae or a juniper, perhaps--and just haul it in for winter? I have two large (2 feet tall, 18 inches wide) galvanized aluminum pots that I was hoping to use. My shop faces north and is just off the Mississippi River, which brings some mighty cold winds. If I have to leave them outside, is there a way to insulate the pots either before or after potting them? Thanks!