Systematic differences between growing areas?
Throughout the world there are a number of hop varieties which are cultivated in different growing regions. For the first time, systematic differences were proven between the growing regions of Yakima (USA) and the Hallertau (Germany) based on the analysis of low-molecular polyphenols in the Perle and Nugget varieties using HPLC (high-performance liquid chromatography). In three crops (1996 - 1998) the Hallertau hops showed a higher polyphenol content than those grown in America [1]. A recent study now compares the two growing areas using the Cascade aroma hop variety.
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