Comet Hops

Dual: Aroma and BitteringAlpha 9.0 - 12.0%United States

Comet stands as a legendary, pathbreaking American cultivar originally bred by the United States Department of Agriculture breeding program at Oregon State University in 1961 and released to the public in 1974 under the designation USDA 62013. Developed by visionaries Dr. C.E. Zimmermann and Dr. S.N. Brooks, this robust variety was created by crossing a fertile English Sunshine female parent with a vigorous, wild American male line sourced from Utah. While it was initially built to provide commercial yards with high-performance bittering power and exceptional resistance to localized root rots, Comet's aggressively pungent, citrus-forward, and wild profile eventually caused it to fall completely out of industrial favor by the 1980s as growers shifted toward modern super-alpha varieties. However, modern craft brewers have triumphantly resurrected this heritage powerhouse, affectionately nicknaming it "Citra®’s Little Sister" due to its shared, heavy-hitting citrus attributes but with a highly desirable, slightly lower alpha acid profile that allows for massive late-kettle saturation.

The profile of Comet is an intensely vivid sensory experience that effortlessly shatters old-world noble restraint in favor of robust, unapologetic American complexity. It yields an explosive, hoppy-fresh bouquet characterized by pungent grapefruit rind, dank cannabis resin, and a deep, crisp background of resinous pine needles. Beneath this bright, aggressive botanical layer, its heavy essential oil matrix reveals a beautifully rounded, sweet tropical-citrus character reminiscent of ripe honeydew melon, wild elderflower blossoms, and freshly crushed tangerine zest. Remarkably bold, expressive, and impactful on the senses, Comet delivers a sharp, invigorating perfume and a solid structural bitterness that dramatically elevates heavily hopped ales, contemporary West Coast IPAs, and experimental craft brews without ever losing its signature wild, rustic edge.

Substitution Tip

If you can't find Comet, the best alternatives are Cascade, Centennial, Citra®, Galena, or Summit.

At A Glance

ProfilePungent Grapefruit Rind, Dank Cannabis Resin, Resinous Pine, Honeydew Melon, Elderflower Blossoms, Tangerine Zest
PurposeDual: Aroma and Bittering
Alpha Acid9.0 - 12.0%
SubstitutesCascade, Centennial, Citra®, Galena, Summit
Pairs withCentennial (to ground a crisp/spicy traditional German foundation), Citra® (to weave a deeply historic/rustic herbal-tea complexity), Simcoe® (to amplify a bright/flowery citrus top note over the noble base)
Beer StylesAmerican India Pale Ale, West Coast India Pale Ale, Pale Ale, Hoppy Amber, Wild/Sour Ale, Imperial Stout

General Information

Country
United States
Alias
USDA 62013
Storage Stability
Retains 45 - 55% alpha acid

Brewing Chemistry (Acids & Oils)

Alpha Acid
9.0 - 12.0%
Beta Acid
4.0 - 6.1%
Cohumulone
34.0 - 45.0%
Total Oil
1.2 - 2.5 ml/100g
Myrcene
40.0 - 65.0%
Humulene
10.0 - 20.0%
Caryophyllene
6.0 - 14.0%
Farnesene
< 1.0%
Linalool
0.3 - 0.6%
B-Pinene
0.6 - 0.9%
Geraniol
0.1 - 0.3%
Total Polyphenols
4.0 - 5.1%
Xanthohumol
0.4 - 0.7%

Growth & Cultivation

Yield
1,800 - 2,200 lbs/acre
Maturity
Medium Early Season
Resistant
Verticillium Wilt, Downy Mildew
Tolerant
Prunus Necrotic Ringspot Virus (PNRV)
Growth Rate
Exceptionally High / Vigorous
Cones
Large, dense, elongated oval structures with highly resilient, resin-soaked bracts.
Ease of Harvest
Good; robust structural bines withstand mechanical picking well, though high resin stickiness requires regular equipment maintenance.
Sex
Female
Leaf Color
Distinctive pale yellow-green to golden-green (a unique genetic trait inherited from its maternal parent, Sunshine, which can often be mistaken for chlorosis or nutrient deficiency in the field).
Side Arm Length
24" - 36" (Long)

Comet Aroma/Flavor Profile

Aroma
Flavor
CitrusTropical FruitStone FruitApple/PearMelonBerryFloralSpicy/HerbalPineResinGrassEarthy/WoodyOnion/GarlicDank/Catty

Discovery Tags

Last Updated
  • 2026-06-05 14:03:21