Stirling
Alpha acid
6–12%
Beta acid
4–6%
Total oil
1.3–1.9 mL
United States
Zeus
Alpha acid
13–17.5%
Beta acid
4–6.5%
Total oil
2.4–4.5 mL
United States
Key differences
When to pick Stirling
- Versatile - works for both bittering and aroma
When to pick Zeus
- Higher alpha acid - stronger bittering
- More essential oils - more intense aroma
- More myrcene - pronounced citrus and resinous notes
- Bittering workhorse - efficient in the mash
Aroma profile and use
No shared aromas - the varieties have divergent profiles.
Only in Stirling
HerbalCitusSpicyFloral
Only in Zeus
Black currantLicoriceCurryPungent
Property
| Property | Stirling | Zeus |
|---|---|---|
| Alpha acid | 6–12% | 13–17.5% |
| Beta acid | 4–6% | 4–6.5% |
| Co-humulone | 21–28% | 28–40% |
| Total oil | 1.3–1.9 mL | 2.4–4.5 mL |
| Myrcene | 44–48% | 45–60% |
| Humulene | 19–23% | 9–18% |
| Caryophyllene | 5–7% | 6–11% |
| Farnesene | 11–17% | 0–1% |
| Origin | United States | United States |
| Purpose | Dual purpose | Bittering |