Hops and Yeast for Sorghum Malt
Barley brewers inherit a buffer they rarely think about: a malt-forward, protein-rich, faintly sweet base that softens hop character and gives yeast a familiar nutrient bed. Sorghum malt gives you a cleaner, drier, thinner canvas. Everything you hang on it shows more — which makes hop and yeast choices louder, not quieter, than in a barley beer.
What production actually used
From Bard's production recipe records:
| Selection | Role | Details |
|---|---|---|
| CTZ | Clean bittering, 90 minutes | ~13% alpha; the workhorse bittering charge |
| Sterling | Flavor and aroma, 15 minutes | The character hop; noble-ish, restrained |
| Tetra hop extract | Head retention, not flavor | ~5 IBU of the total, swapped in — the rule and why it works |
| American ale yeast | Clean, neutral fermentation | Fermented at 20.5°C, diacetyl rest at 5°P / 22°C, crashed to 1°C |
| British ale yeast | Warmer, fruitier profile — used where the beer wanted it | Run at the cool bottom of its range (see Tavern Ale Version A) |
Target profile for the flagship: 18 IBU total, five of which came from the tetra extract, on a 10.5°P wort finishing near 4.7% ABV. That bitterness number matters — it is deliberately modest, because on a sorghum base there is less malt sweetness to balance against.
The earlier recipe for the same beer was hopped German. The 2016 production procedure — the extract-era process, same flagship, same 18 IBU and 4.7% spec — ran German Magnum for bittering and German Tettnang in two late additions, on a 100% malted-sorghum base. Two documented hop bills across two production eras, and the German one came first.
And one more German data point, from memory rather than paper: Bard's also brewed an Oktoberfest-style lager — fermented at ale temperatures — hopped with Tettnang and Hallertau. That one is Craig's recall from the brewing years; no batch record has surfaced yet, and if one does, it graduates from memory to document.
The observation we never got to test
Craig's field experience, stated as experience and not as a finding: German hop varieties worked well with sorghum malt. Some others did not — Saaz in particular clashed. The production record above leans the same way — Magnum and Tettnang carried the flagship for years — but a recipe that worked is still not a controlled comparison.
We do not have controlled data for that, and we are not going to pretend otherwise. What we have is repeated brewing at commercial scale and a consistent impression that certain hop character sat badly on a sorghum base while German varieties integrated cleanly.
A plausible mechanism, offered as hypothesis only: sorghum's thinner body and lower residual sweetness leave hop character less buffered, so varieties whose profile depends on a malty counterweight can read harsh, grassy, or disjointed. That would explain why restrained noble and noble-adjacent varieties tend to sit well. It would also be testable in a weekend by anyone with two kettles.
This is one of the cleanest open questions on this site. Brew the same 100% sorghum malt base, split it, and bitter and finish each half with a different hop variety — one German, one from the group that seemed to clash. Report what happened. Two or three independent reports would turn a twenty-year impression into something the field can actually use. Send results — this one is Research Ask #1.
Yeast: two things that matter more than strain
Gluten status is not optional. Brewing yeast is grown on a substrate, and that substrate is frequently barley wort. A gluten-free beer fermented with yeast propagated on barley wort has a documented gluten pathway. Get the manufacturer's gluten-free statement in writing and keep it with the batch record — the full argument is on Yeast Selection, and the supplier-by-supplier reality is on Yeast Supplier Gluten-Free Statements.
Nutrition is a design input, not an afterthought. Sorghum wort runs roughly half of barley's free amino nitrogen — the measured basis is in the published screening and production data. A strain that ferments barley wort cleanly may throw stress character on sorghum wort at the same pitch rate — which is why production carried a yeast nutrient addition as standard, not as a rescue. See Yeast Nutrition.
How to choose, on a sorghum base
- Start restrained on bitterness. There is less malt sweetness to balance against; what reads as moderate on barley can read as sharp here.
- Swap ~5 IBU to tetra extract for foam, and trim the kettle charge to keep net bitterness on target.
- Prefer varieties that don't need a malt counterweight until you have your own results — noble and noble-adjacent German varieties are where our experience points.
- Verify yeast gluten status in writing, then choose the strain for the beer.
- Plan the nutrient addition with the recipe, not after a stuck fermentation.
- Change one variable per batch and write it down. That is how the impression above becomes evidence.
Related
- The 5 IBU Hop Extract Rule
- Yeast Selection · Yeast Nutrition
- Tavern Ale, Version A — German hops and British ale yeast in practice
- The Reliable Mash
Source and Validation Notes
Hop varieties, timings, bitterness targets, yeast type, and fermentation temperatures come from Bard's production recipe records, including the February 2016 extract-era brewing procedure for the flagship. The German-varieties-suit-sorghum and Saaz-clashes observation is Craig's commercial field experience across many batches, not a controlled comparison, and the proposed mechanism behind it is an untested hypothesis stated as such. Alpha acid percentages vary by crop year; treat the recorded value as historical, not as a specification.