I am a huge fan of the fall gardening season, so my garden is now stocked with young plantings of a dozen cool-season crops. All face a long list of threats, including hail, wind, insects and deer, but they are completely protected when grown beneath low tunnels. As the days get shorter and cooler in the coming weeks, the low tunnels will keep surface temperatures slightly warmer and delay freezing of the soil – if it freezes at all.
These are the same benefits you might get with an unheated greenhouse, at a fraction of the cost. And unlike a greenhouse, low tunnels can be moved to where they are most needed in a matter of minutes.