CTZ Rhizome

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Hop Qualities

CTZ Rhizome Flavor

A high yielding, high alpha acid American bittering hop. Also known by the trade name Tomahawk. One of the "Three Cs" along with Cascade and Centennial. Like the others it is citrusy and slightly woody. Columbus has a very high amount of total oils, and can impart a 'resiny' quality to a beer.(Reference)

Hop Growers of America Information

Along with Zeus and Tomahawk, these three super high alpha varieties are often grouped together and referred to as CTZ. Each of these varieties has alpha acid content of between 14.5-16.5nd share the same female parent as Nugget. Originally bred for their high alpha value, they have also become popular for their oil profile.
Commercial Examples:
American IPAs & Pale Ales, Stout, Lager
Acid Range (Alpha %)
14.5–16.5% 14.5–16.5%
Beta Range
28% of alpha acids
Total Oils
2–3 Mls. per 100 grams dried hops
40–50% of total oils
9% of total oils
12–18% of total oils
Possible Substitutions
52% alpha acids remaining after 6 months storage at 20° C
Rhizome Growing Information
New, super high alpha variety with noticeable bitterness developed in the Yakima (WA) Valley as part of the Hopsteiner breeding program; vigorous growth with good yield, mid-to late-season maturity; moderately susceptible to Powdery Mildew, aphids and mites; sister to Columbus and Tomahawk.

USDA CTZ Rhizome Information

USDA ACCESSION NO.: not applicable
SELECTION: not disclosed
GENUS: humulus
SPECIES: lupulus
PEDIGREE: not disclosed, but probably derived from Brewer's Gold
PRIMARY SITE: S.S. Steiner Hop Farms, Washington
ORIGIN: seedling selection
DATRE RECEIVED: not applicable
METHOD RECEIVED: not applicable
AVAILABILITY: private variety, not generally available
REFERENCES: Hilton, Jerrold F. 1998. Hops into the Millennium. S.S. Steiner Inc.
New York, N.Y. 10021-8078
MATURITY: mid season to late season
LEAF COLOR: dark green
SEX: female
DISEASES: no information available. Reputed to be resistant to powdery mildew
VIGOR: very good
YIELD: very good, 2,400 to 3,000 lbs/acre
SIDE ARM LENGTH: no information available
ALPHA ACIDS: 13 to 17 one field reportedly had about 20lpha (at harvest??)
BETA ACIDS: 4.5 to 6.5
COHUMULONE: 30 to 40
STORAGE STABILITY: studies in progress
OIL: 2.4l/100 g; myrcene 55-70 humulene 10-20
Caryophyllene 5-10 farnesene < 10f total oil
MAJOR TRAITS: high yield potential, high alpha acids content, abundant lupulin, pleasant aroma, somewhat pungent according to one brewmaster.
OTHER INFORMATION: Private variety under control of S.S., Steiner Co. Hop grown by several Washington growers under private agreement with S.S. Steiner Inc.

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