Columbus is easy to spot in commercial beers. The aroma is the same as you would expect at a Phish concert. Columbus was developed by Charles Zimmermann while working for the USDA. He resigned and the hop was leaked. Both Yakima Chief and Hop Union tried to patent the same hop and there was a lawsuit. Yakima Chief named theirs Tomahawk and Hop Union calls theirs Columbus. An agreement was reached and both distributors market the same hop under different names. Confusing? I think not. Disturbing? Perhaps.
Gas chromatography has disclosed that Columbus and Tomahawk are the exact same thing, but that Zeus (Marketed by HopSteiner) is just a tad different. But its characteristics are so close to Columbus and Tomahawk that the nickname CTZ (Columbus, Tomahawk, Zeus) has become the accepted way to refer to all three.
Alpha Acids: 14.0 – 16.0%
Beta Acids: 4.0 – 5.5%
Alpha-Beta Ratio: 2.55 – 4
Cohumulone: (% of alpha acids): 30 – 35%
Total Oils in mls per 100 grams dried: 1.5 – 2.0
Storage(% alpha acids remaining after 6 months storage at 68° F) 45 – 65%
Similar Hop Varieties: Columbus, Tomahawk, Zeus, Chinook, Centennial, Nugget, Millennium