Utah State University Extension
This fact sheet describes how using simple, low-cost 2-season tunnels to modify early spring growth moves the production window earlier and may provide an economically viable method for raspberry growers in Utah, especially in areas prone to early fall freezes.
Black, Brent and Maughan, Tiffany, "High Tunnels for Earlier Production of Fall (primocane) Raspberries" (2019). All Current Publications. Paper 2037.