Low tech ag
Everyone should have a high tunnel!
We inadvertently did a trial last year, beets that were inside low tunnels or high tunnels had a growth rate of 3x to 5x compared to those that were outside. Reduced desiccation, predation and a little more warmth make a huge difference in growth.
The above is a great guide.
Here in the mountains of NM we had a week of 10 below temps and 2 feet of snow. The tunnels shrugged off the snow, we did lose some lettuce to the cold, we are binging on spinach every night. Winter spinach is sweet an delicious!