Interest in locally grown food crops coupled with the increase in craft breweries around the United States has created a hop production craze. Hop cones are the product added to beer to enhance flavor and these are derived from Humulus lupulus (common hop). Midwest production of hops dates back to the early 20th century but due to downy mildew and mites, production moved to the drier climates of the Pacific Northwest (PNW) where it still dominates today. Washington, Oregon, and Idaho are the three largest states in hop production within the United States; however, with the excitement of craft breweries,production outside of the PNW has reemerged. Michigan is now the fourth largest state in hop production within the United States.
Cochran, Diana and Carpenter, Brandon
"Hop Research Project: Installation of the Hop Yard,"
Farm Progress Reports: Vol. 2015
, Article 45.
Available at: https://lib.dr.iastate.edu/farmprogressreports/vol2015/iss1/45