DeltavsDr. Rudi

Delta (aroma) and Dr. Rudi (dual purpose) serve different purposes. Comparing acids, aromas and character helps pick the right hop.

Delta

Aroma

Alpha acid

5.5–7%

Beta acid

5.5–7%

Total oil

0.5–1.1 mL

United States

Dr. Rudi

Dual purpose

Alpha acid

10–12%

Beta acid

7–8.5%

Total oil

1.3–1.6 mL

New Zealand

Key differences

When to pick Delta

  • Aroma-focused - ideal for dry hopping

When to pick Dr. Rudi

  • Higher alpha acid - stronger bittering
  • More essential oils - more intense aroma
  • Higher beta acid - smoother, longer-lasting bitterness
  • Versatile - works for both bittering and aroma

Aroma profile and use

No shared aromas - the varieties have divergent profiles.

Only in Delta

CitrusMelonSpicy

Only in Dr. Rudi

ResinPineLemongrass

Property

PropertyDeltaDr. Rudi
Alpha acid5.5–7%10–12%
Beta acid5.5–7%7–8.5%
Co-humulone22–24%36–39%
Total oil0.5–1.1 mL1.3–1.6 mL
Myrcene25–40%28–30%
Humulene25–35%33–34%
Caryophyllene9–15%9–11%
Farnesene0–1%0–1%
OriginUnited StatesNew Zealand
PurposeAromaDual purpose

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