Southern TropicvsRiwaka
Southern Tropic (bittering) and Riwaka (aroma) serve different purposes. Comparing acids, aromas and character helps pick the right hop.
Southern Tropic
Alpha acid
12.6–18.1%
Beta acid
5–6.5%
Total oil
-
South Africa
Riwaka
Alpha acid
4.5–6.5%
Beta acid
4–5%
Total oil
0.8–1.5 mL
New Zealand
Key differences
When to pick Southern Tropic
- Higher alpha acid - stronger bittering
- Higher beta acid - smoother, longer-lasting bitterness
- Bittering workhorse - efficient in the mash
- Richer, more complex aroma profile
When to pick Riwaka
- More myrcene - pronounced citrus and resinous notes
- Aroma-focused - ideal for dry hopping
Aroma profile and use
Shared aromas
Citrus
Only in Southern Tropic
MelonTroicalGuavaButterscotchLemongrassCoconutPungentPineappleBubblegum
Only in Riwaka
TropicalPassion fruitGrapefruit
Property
| Property | Southern Tropic | Riwaka |
|---|---|---|
| Alpha acid | 12.6–18.1% | 4.5–6.5% |
| Beta acid | 5–6.5% | 4–5% |
| Co-humulone | 26–30% | 29–38% |
| Total oil | - | 0.8–1.5 mL |
| Myrcene | 19–46% | 67–70% |
| Humulene | 14–40% | 8–10% |
| Caryophyllene | 6–14% | 2–6% |
| Farnesene | 8–11% | 0–1% |
| Origin | South Africa | New Zealand |
| Purpose | Bittering | Aroma |
Calypso