Progress
Alpha acid
5–7.5%
Beta acid
1.8–2.7%
Total oil
0.5–0.8 mL
United Kingdom
Stirling
Alpha acid
6–12%
Beta acid
4–6%
Total oil
1.3–1.9 mL
United States
Key differences
When to pick Progress
- Aroma-focused - ideal for dry hopping
- Richer, more complex aroma profile
When to pick Stirling
- Higher alpha acid - stronger bittering
- More essential oils - more intense aroma
- Higher beta acid - smoother, longer-lasting bitterness
- More myrcene - pronounced citrus and resinous notes
- Versatile - works for both bittering and aroma
Aroma profile and use
Shared aromas
Floral
Only in Progress
GrassyMintSweetHoneyBlack currantFruity
Only in Stirling
HerbalCitusSpicy
Property
| Property | Progress | Stirling |
|---|---|---|
| Alpha acid | 5–7.5% | 6–12% |
| Beta acid | 1.8–2.7% | 4–6% |
| Co-humulone | 25–27% | 21–28% |
| Total oil | 0.5–0.8 mL | 1.3–1.9 mL |
| Myrcene | 25–30% | 44–48% |
| Humulene | 40–47% | 19–23% |
| Caryophyllene | 12–15% | 5–7% |
| Farnesene | 0–1% | 11–17% |
| Origin | United Kingdom | United States |
| Purpose | Aroma | Dual purpose |