Dr. Rudi Hops

Dual: Aroma and BitteringAlpha 10.0 - 12.0%New Zealand

Dr. Rudi stands as a pioneering New Zealand triploid cultivar that heavily shaped the nation's contemporary craft identity. Developed at New Zealand's Department of Scientific and Industrial Research and released to the brewing world in 1976, this high-performing variety was originally christened "Super Alpha" due to its breakthrough, high-potency bittering content for the era. Bred as an open-pollinated cross utilizing the native New Zealand Smoothcone landrace, the variety was officially rebranded as Dr. Rudi in 2012 to honor Dr. Rudi Roborgh—widely considered the "father of New Zealand hops"—and to distinguish its highly refined aromatic capabilities from purely industrial bittering strains. Operating seamlessly across dual-purpose roles, this robust workhorse remains a foundational and highly dependable staple within modern Southern Hemisphere brewing programs.

The profile of Dr. Rudi is a brilliant, multi-layered aromatic showcase that masterfully merges crisp, clean New World attributes with a grounded, European-style noble reliability. The initial sensory impact is exceptionally refreshing, leading with a bright, oil-rich burst of zesty lemongrass and fresh-peeled citrus fruits. As the aromatics unfurl across the palate, a distinct, structurally grounding back-end emerges, coating the senses in a comforting display of damp pine resin, crushed green needles, and fresh mountain herbs. Backed by a smooth, non-lingering bitterness and generous essential oils, Dr. Rudi delivers a clean, vibrantly present aromatic performance that entirely avoids any aggressive or overwhelming garlic or onion-like undertones.

Substitution Tip

If you can't find Dr. Rudi, the best alternatives are Cascade, Galena, Green Bullet, Northern Brewer, or Pacific Gem.

At A Glance

ProfileOil-Rich Lemongrass, Fresh Citrus, Crisp Pine Resin, Mountain Herbs
PurposeDual: Aroma and Bittering
Alpha Acid10.0 - 12.0%
SubstitutesCascade, Galena, Green Bullet, Northern Brewer, Pacific Gem
Pairs withCascade (to weave a familiar/grapefruit-and-floral American classic balance), Motueka (to drive the profile into a brighter/sweet-lime citrus territory), Nelson Sauvin (to amplify a complex white-wine fruitiness over a crisp resin backdrop)
Beer StylesIndia Pale Ale, American Pale Ale, Imperial/Double India Pale Ale, Hoppy Lager, Pilsner, Golden Ale

General Information

Country
New Zealand
Aliases
Dr Rudi, Super Alpha
Storage Stability
Retains 75 - 80% alpha acid

Brewing Chemistry (Acids & Oils)

Alpha Acid
10.0 - 12.0%
Beta Acid
7.0 - 8.5%
Cohumulone
25.0 - 28.0%
Total Oil
1.3 - 1.6 ml/100g
Myrcene
45.0 - 55.0%
Humulene
15.0 - 22.0%
Caryophyllene
9.0 - 12.0%
Farnesene
< 1.0%
Linalool
0.4 - 0.6%
B-Pinene
0.6 - 0.9%
Geraniol
0.4 - 0.7%

Growth & Cultivation

Yield
1,800 - 2,200 lbs/acre
Resistant
Shows excellent physical resistance to common molds and mildews.
Growth Rate
Very High / Vigorous
Sex
Female
Leaf Color
Medium Green

Discovery Tags

Last Updated
  • 2026-06-02 20:22:15