Whether you use low tunnels to cover a small area of your backyard garden, or construct a large hoophouse or greenhouse, these low-cost technologies can significantly extend the growing season, improve quality, and increase yields and profits.
There are many websites with detailed information on how to construct hoophouses or low tunnels. Here are a few good places to start:
Overview and Details:
High Tunnels, Low Tunnels, and Greenhouses:
Building a Hoop House video series, Adam Montri, Michigan State University, 2008:
Growing Under High Tunnels in Illinois and the Midwest, Zachary Grant, University of Illinois Extension, 2014: https://pubsplus.illinois.edu/CS01.html
Michigan State University Hoophouse Website, 2015:
Season Extension Resources Database, Midwest Organic and Sustainable Education Service, 2015: http://mosesorganic.org/farming/farming-topics/season-extension/