Southern TropicvsAhtanum
Southern Tropic (bittering) and Ahtanum (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
Ahtanum
Alpha acid
3.5–6.5%
Beta acid
4–6.5%
Total oil
0.5–1.7 mL
United States
Key differences
When to pick Southern Tropic
- Higher alpha acid - stronger bittering
- Bittering workhorse - efficient in the mash
- Richer, more complex aroma profile
When to pick Ahtanum
- 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 Ahtanum
GrapefruitGeraniumPineEarthyFloralCedarLemon
Property
| Property | Southern Tropic | Ahtanum |
|---|---|---|
| Alpha acid | 12.6–18.1% | 3.5–6.5% |
| Beta acid | 5–6.5% | 4–6.5% |
| Co-humulone | 26–30% | 30–35% |
| Total oil | - | 0.5–1.7 mL |
| Myrcene | 19–46% | 45–55% |
| Humulene | 14–40% | 15–22% |
| Caryophyllene | 6–14% | 9–12% |
| Farnesene | 8–11% | 0–1% |
| Origin | South Africa | United States |
| Purpose | Bittering | Aroma |