Extending the seasons - how to make a poly or shade tunnel

All of us who grow food, keep chickens or bees, milk a house cow or a goat, or keep pigs have to know a thing or two about the seasons. Here in the sub-tropics, although we recognise four seasons exist, we usually have two real seasons - hot and cold. I can't tell you how much I usually complain about the hot season. I am a cool woman, what can I say. But I've decided to enjoy every day from now