It looks like we are going to get a freeze tonight. It is supposed to be right at freezing in Austin and we are usually a few degrees lower than they are. Being a long time gardener, you learn to deal with it. I have saved large pieces of plastic and wraps for bundled material, so that I can cover the beds of row type crops. I use buckets and flower pots for the individual plants like tomatoes and peppers. You can't forget to put a rock over the hole in the pot though.