Stirling
Alpha acid
6–12%
Beta acid
4–6%
Total oil
1.3–1.9 mL
United States
Ultra
Alpha acid
3–9.7%
Beta acid
3.6–5%
Total oil
0.8–1.5 mL
United States
Key differences
When to pick Stirling
- Higher alpha acid - stronger bittering
- More essential oils - more intense aroma
- Versatile - works for both bittering and aroma
When to pick Ultra
- More myrcene - pronounced citrus and resinous notes
- Aroma-focused - ideal for dry hopping
Aroma profile and use
Shared aromas
Floral
Only in Stirling
HerbalCitusSpicy
Only in Ultra
MildPleasant
Property
| Property | Stirling | Ultra |
|---|---|---|
| Alpha acid | 6–12% | 3–9.7% |
| Beta acid | 4–6% | 3.6–5% |
| Co-humulone | 21–28% | 25–35% |
| Total oil | 1.3–1.9 mL | 0.8–1.5 mL |
| Myrcene | 44–48% | 50–60% |
| Humulene | 19–23% | 10–15% |
| Caryophyllene | 5–7% | 6–9% |
| Farnesene | 11–17% | 0–1% |
| Origin | United States | United States |
| Purpose | Dual purpose | Aroma |
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