Lancashire has never been shy of a fermented apple. For generations, farmhouse cidermakers around the Ribble Valley and the orchards west of Preston relied on whatever yeast happened to be sitting on the fruit, in the rafters of the barn, or on the press itself. Nothing was pitched, nothing was measured, and the cider was ready when it was ready. Modern makers have far more tools at their disposal, but the underlying truth is unchanged: the apples supply the sugar, and the yeast decides what kind of drink you end up with. Understanding how that works is the difference between a hit-and-miss brew and a repeatable one.
There are broadly two routes — wild fermentation and cultured fermentation — and most interesting ciders sit somewhere between the two. A handful of makers run a deliberate mixed approach, kicking off with a known strain and letting the native population finish the job.
Fresh-pressed apple juice is not sterile. It arrives at the fermenter carrying a genuine ecosystem of yeasts and bacteria, and given a few days it will start fermenting all by itself. Traditional West Country and Lancastrian farmhouse ciders lean hard on this.
The succession is fairly predictable. Non-Saccharomyces species such as Hanseniaspora and Metschnikowia dominate the first day or two, producing fruity esters alongside a little acetic acid and ethyl acetate. As alcohol accumulates, they fade and Saccharomyces cerevisiae takes over — sometimes joined by S. bayanus — carrying the fermentation through to dryness. The lag phase can run two to four days, which feels alarming if you are used to a fast, clean pitch.
A cool Lancashire autumn is actually an advantage here. Ferments that creep along at 12–15°C retain far more aromatic character than a hot, racing fermentation.
If wild fermentation is jazz, cultured yeast is a written score. Dried cider strains, or carefully propagated liquid cultures, let you choose the character before you start. Some are prized for crispness and high attenuation, others for floral esters or a soft, full mid-palate.
Practical details matter more than brand loyalty. A typical dried cider yeast pitch runs at roughly 10–20 g per hectolitre, rehydrated in water at 30–35°C for fifteen minutes before being blended into a little juice. Below that rate you invite sluggish starts and sulphur off-flavours. Apple juice is also short on available nitrogen, so a nutrient addition — diammonium phosphate plus a pinch of thiamine — is often worth it, particularly with culinary apple blends.
Temperature is your main flavour dial:
Flocculation is the other quiet benefit. A strongly flocculent strain drops bright without finings, which saves you a racking step later.
Once the primary sugar fermentation slows, a second biological process often begins. Malolactic fermentation converts sharp malic acid into softer lactic acid, dropping total acidity and rounding the palate. In traditional cider it usually happens spontaneously in the spring as things warm up; many modern makers encourage it deliberately with a selected lactic culture.
Left alone, malolactic can bring buttery diacetyl or a slightly phenolic edge. Managed well, it gives the cider a fuller, gentler structure that suits dry blends beautifully. If you want to preserve a bracing, acidic style, cold-settle the cider after primary fermentation and rack it off the heavy lees before temperatures rise.
Lancashire makers working with sharp, late-season fruit — Bramley, Keswick Codlin, local bittersharp seedlings — tend to value malolactic more than those using sweeter dessert apples, simply because there is more malic acid to soften.
Fermentation finishing at 1.000 or below does not mean the cider is finished. The weeks and months afterwards decide much of the final quality.
Lees ageing, or sur lie, builds texture and savoury depth. Yeast cells break down slowly and release mannoproteins and amino acids, softening tannin and adding body. Three to six months on fine lees is a reasonable starting point for a traditional dry cider. Rack off before the lees turn sulphurous or bitter.
For clarity, time and gravity do most of the work. Isinglass, bentonite or chitosan will speed things up if you are in a hurry, but a cold spell outdoors in February is the cheapest fining agent available. Follow with a racking into a clean vessel and a few weeks of settling.
Bottle conditioning needs care and patience. Prime with roughly 5–7 g of sugar per litre for around 2.5 volumes of carbon dioxide, use strong bottles, and let them sit warm for two weeks before moving them somewhere cool. Wild-fermented ciders with residual sugar are best bottled into champagne-style glass with a proper closure — a dry cider at 0.996 specific gravity is forgiving, but a half-fermented one is not.
Get the yeast right and the cider almost makes itself. Get it wrong and no amount of blending or ageing will quite rescue it — which is why, from orchard to bottle, the fermentation is the part worth understanding properly.
Lancashire Beverages shares practical, down-to-earth guidance on lancashire drinks culture, covering real ale, craft beer, hot drinks, cider, soft drinks and home brewing. for readers across the UK.
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