Herkules
Alpha acid
12–17%
Beta acid
4–5.5%
Total oil
1.4–2.4 mL
Germany
Stirling
Alpha acid
6–12%
Beta acid
4–6%
Total oil
1.3–1.9 mL
United States
Key differences
When to pick Herkules
- Higher alpha acid - stronger bittering
- Bittering workhorse - efficient in the mash
When to pick Stirling
- More myrcene - pronounced citrus and resinous notes
- Versatile - works for both bittering and aroma
- Richer, more complex aroma profile
Aroma profile and use
No shared aromas - the varieties have divergent profiles.
Only in Herkules
CitrusMelon
Only in Stirling
HerbalCitusSpicyFloral
Property
| Property | Herkules | Stirling |
|---|---|---|
| Alpha acid | 12–17% | 6–12% |
| Beta acid | 4–5.5% | 4–6% |
| Co-humulone | 32–38% | 21–28% |
| Total oil | 1.4–2.4 mL | 1.3–1.9 mL |
| Myrcene | 30–50% | 44–48% |
| Humulene | 30–45% | 19–23% |
| Caryophyllene | 7–12% | 5–7% |
| Farnesene | 0–1% | 11–17% |
| Origin | Germany | United States |
| Purpose | Bittering | Dual purpose |