Construction Plans for a Custom Designed Low (Mini) Tunnel

A more flexible method of ventilating the tunnel employs the use of pins inserted into holes drilled into the hoops at desired locations. The pins prevent the cover from sliding down the hoops. This technique enables the gardener to regulate the amount of ventilation on both sides of the tunnel independently of one another.

When the tunnel is no longer needed, the cover can be nested to one side of the bed. Depending on the crops grown, the hoops and straps can remain in place or be removed from the bed. Leaving the tunnel components on site year round is less work, but there is a downside – both the polyethylene cover and PVC pipe are susceptible to sunlight degradation, which will shorten their service life.