Summer
Alpha acid
5.6–6.4%
Beta acid
4.8–6.1%
Total oil
1.4–2 mL
Australia
Zappa
Alpha acid
6–9%
Beta acid
8–9%
Total oil
1.8–2.5 mL
United States
Key differences
When to pick Summer
No clear differences - both varieties have a similar profile. Choose based on availability or country of origin.
When to pick Zappa
- 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
- Richer, more complex aroma profile
Aroma profile and use
Shared aromas
CitrusPassion fruit
Only in Summer
ApricotMelonGrassyStone fruitPeach
Only in Zappa
MintSavoryFruityMangoTropicalPineSpicyFresh
Property
| Property | Summer | Zappa |
|---|---|---|
| Alpha acid | 5.6–6.4% | 6–9% |
| Beta acid | 4.8–6.1% | 8–9% |
| Co-humulone | 20–25% | 40–45% |
| Total oil | 1.4–2 mL | 1.8–2.5 mL |
| Myrcene | 29–38% | 64–65% |
| Humulene | 28–50% | 4–5% |
| Caryophyllene | 8–11% | 8–9% |
| Farnesene | 0–1% | 0–1% |
| Origin | Australia | United States |
| Purpose | Aroma | Aroma |