Letting the Beer Lead: How Wild Fermentation Shapes Our Beers

One of the most fascinating things about brewing with wild fermentation and barrel ageing is that you rarely know exactly what the final beer will become.

When a beer goes into barrel, it begins a long and slow process of evolution. Over months, and sometimes years, wild yeast and bacteria slowly transform the beer, developing flavours that weren’t present when the beer was first brewed.

Unlike clean fermentation, where the brewer has a fairly clear idea of the finished beer from the beginning, wild fermentation tends to reveal its character gradually. The beer evolves in ways that can be surprising, and often the direction of the final beer only becomes clear over time.

Because of this, brewing wild beer is as much about "listening" as it is about planning.

As barrels mature, we taste them regularly. Sometimes a beer begins to express subtle fruit notes like peach, apricot, citrus or soft stone fruit, even though no fruit was ever added. These flavours come entirely from the activity of wild yeast and bacteria working slowly in the barrel.

When that happens, we start thinking about how those flavours could be highlighted or complemented.If a barrel begins showing soft apricot or stone fruit notes, we might decide to blend that beer onto fresh apricots, allowing the fruit to amplify the character that has already emerged naturally.

A good example of this is Chapter Three, our recent collaboration with Coolum Beer Co. The base beer spent around eighteen months ageing in barrel before being blended onto apricots for a further four months. The fruit didn’t define the beer from the start — it was chosen later to complement the apricot and stone fruit character that had already developed through fermentation and barrel ageing.

Other times the beer may evolve in a completely different direction. Some barrels develop delicate floral or herbal aromatics, gentle chamomile notes, subtle spice or soft honeyed tones. In those cases we might choose something equally delicate, like a chamomile infusion, to bring those flavours forward.

None of this is planned on brew day. Instead, the process unfolds over time.

Blending, fruiting and finishing decisions often happen many months after the beer first enters the barrel, once the character of the fermentation has revealed itself. Each barrel evolves slightly differently, and part of the craft of wild brewing is recognising what each beer wants to become. In many ways, the brewer’s role becomes less about controlling the outcome and more about guiding the beer in the right direction.

It’s a slower, more patient approach to brewing, one where the final beer is discovered rather than designed.

And that unpredictability is part of what makes wild fermentation so exciting.