Cluster
Alpha acid
5.5–9%
Beta acid
4.5–6%
Total oil
0.4–1 mL
United States
Stirling
Alpha acid
6–12%
Beta acid
4–6%
Total oil
1.3–1.9 mL
United States
Key differences
When to pick Cluster
No clear differences - both varieties have a similar profile. Choose based on availability or country of origin.
When to pick Stirling
- Higher alpha acid - stronger bittering
- More essential oils - more intense aroma
Aroma profile and use
Shared aromas
Floral
Only in Cluster
EarthySweet
Only in Stirling
HerbalCitusSpicy
Property
| Property | Cluster | Stirling |
|---|---|---|
| Alpha acid | 5.5–9% | 6–12% |
| Beta acid | 4.5–6% | 4–6% |
| Co-humulone | 33–43% | 21–28% |
| Total oil | 0.4–1 mL | 1.3–1.9 mL |
| Myrcene | 38–46% | 44–48% |
| Humulene | 15–20% | 19–23% |
| Caryophyllene | 8–10% | 5–7% |
| Farnesene | 0–1% | 11–17% |
| Origin | United States | United States |
| Purpose | Dual purpose | Dual purpose |