Astra
Alpha acid
7–10%
Beta acid
4–6%
Total oil
1–3 mL
Australia
Cluster
Alpha acid
5.5–9%
Beta acid
4.5–6%
Total oil
0.4–1 mL
United States
Key differences
When to pick Astra
- Higher alpha acid - stronger bittering
- More essential oils - more intense aroma
- Richer, more complex aroma profile
When to pick Cluster
No clear differences - both varieties have a similar profile. Choose based on availability or country of origin.
Aroma profile and use
Shared aromas
Sweet
Only in Astra
TropicalPeachWhiteMelonGrassyGrapefruitHoney
Only in Cluster
FloralEarthy
Property
| Property | Astra | Cluster |
|---|---|---|
| Alpha acid | 7–10% | 5.5–9% |
| Beta acid | 4–6% | 4.5–6% |
| Co-humulone | 26–28% | 33–43% |
| Total oil | 1–3 mL | 0.4–1 mL |
| Myrcene | - | 38–46% |
| Humulene | 6–8% | 15–20% |
| Caryophyllene | 2–3% | 8–10% |
| Farnesene | - | 0–1% |
| Origin | Australia | United States |
| Purpose | Dual purpose | Dual purpose |