DIY Portable Low Tunnel KitDIY Low Tunnels Protect your seedlings from extreme temperatures, insects, and sunscald. Low tunnels offer many of the benefits of a hoop house without a big investment of space or money. Once built, they are easy to move between garden beds or rows of crops. Snap on clamps make it easy to switch coverings from greenhouse plastic in the coolness of early spring to shade cloth in the heat of summer. Learn how to effectively extend your growing season