Maturation
Cold maturation
Holding cider at low temperature so that it settles bright, sheds colloidal material and stops changing microbially, without any additive or treatment being applied.
Also called Cold conditioning, Cold resting.
- Stage
- Maturation
- Traditional in
- No single tradition — used wherever it suits
- What it most changes
- Astringency down
- Safety
- None recorded
What it is
Cold maturation is the practice of keeping cider cold through its resting period — in an unheated winter cellar, an outbuilding, or a refrigerated tank — and letting low temperature do several jobs at once. Suspended yeast and colloidal material settle faster and more completely, microbial activity of every kind slows to near nothing, and the cider clears on its own. Nothing is dosed and nothing is removed except what falls out by gravity. In much of northern Europe it is not a technique at all but simply the condition of a cellar between November and March.
Why it is used
- Cold slows yeast and bacterial metabolism to the point where a cider with residual sugar can be held for months without refermenting, buying the maker time without any stabilising addition.
- Low temperature reduces the solubility of proteins and of tannin-protein complexes, so material that would later have hazed a bottle drops out while the cider is still in bulk.
- A cold cider is more viscous but its suspended particles also flocculate more readily, and the net effect in practice is a faster and sharper natural clarification.
- For a producer who wants to avoid fining and filtration, holding cold and being patient is the least interventionist route to a bright cider.
How it works
- Yeast and bacterial enzyme activity falls steeply with temperature, so fermentation and spoilage reactions that would proceed in weeks at cellar temperature take many months near freezing.
- Cold reduces the solubility of proteins and phenolic-protein complexes and weakens the electrostatic repulsion that keeps colloidal particles dispersed, so they aggregate and settle.
- Chilling drives yeast flocculation and compaction, producing a firmer deposit that releases less material back into the cider when it is racked off.
- Carbon dioxide is markedly more soluble cold, so a cider held chilled retains dissolved gas that would have been lost at cellar temperature.
What it changes
The direction this step pushes the finished drink in, dimension by dimension. A direction, not a measurement: how far it moves depends on the juice, the temperature and how the step is carried out.
| Dimension | Direction | Why |
|---|---|---|
| Sweetness | Preserves | Yeast activity is suppressed rather than removed, so residual sugar remains where it is for as long as the cider stays cold — and only for that long. |
| Freshness | Preserves | Every reaction that degrades aroma, including oxidative ones, runs more slowly at low temperature, so the cider drawn off in spring is close to the one put away in autumn. |
| Astringency | Lowers | Tannin-protein complexes become less soluble and precipitate, taking part of the astringent phenolic fraction out of the cider altogether. |
The chemistry and the organisms
What is actually being changed, and by what. Each entry says what that compound or organism does in cider generally; this page is one place it does it.
Compounds involved
Carbon dioxide
The other product of fermentation, which protects a cider from air while it is being made and, dissolved in the finished drink, changes both its texture and its perceived acidity.
Dissolved oxygen
Essential to a healthy yeast population at the start of fermentation and the principal enemy of a cider from the moment fermentation ends.
Beta-glucan
The bacterial exopolysaccharide behind ropiness, which turns a cider oily and thread-like without changing how it smells or tastes.
Tannin–protein complexes
What astringency physically is: long tannin chains cross-linking salivary proteins and precipitating them, which is also the mechanism behind fining, protein haze and the classic cider-and-cheese pairing.
Organisms involved
Saccharomyces cerevisiae
The yeast that finishes essentially every cider, whether it arrives in a sachet or from the fruit, the press and the vessel.
Oenococcus oeni
The acid-tolerant lactic acid bacterium that carries out most deliberate malolactic fermentation, converting malic acid to lactic acid after the yeast has finished.
Brettanomyces anomalus
The second Brettanomyces species regularly recovered from cider and beer, less studied than B. bruxellensis but capable of the same phenolic chemistry.
What it is done with
What can go wrong
Faults that begin at this step, or that this step makes more likely. Each one is set out with its causes and whether it can be put right.
Reduction
A closed, stale, slightly sulphurous character in cider held under strongly oxygen-free conditions, sometimes clearing with air and sometimes not.
Protein haze
A fine haze that forms as protein and tannin combine into insoluble complexes, often appearing in a cider that had already been clear.
Yeast haze
Cloudiness from yeast cells that have not settled out, usually because the strain flocculates poorly or the cider has not been left alone long enough.
Stuck fermentation
A fermentation that has stopped before the sugar is gone and will not restart, leaving a sweet, low-alcohol cider that is vulnerable to everything.
Excessive sediment
More deposit in the bottle or vessel than the presentation intends, ranging from a normal conditioning yeast layer to a loose sludge that clouds every pour.
Styles it produces
Categories in which this step is characteristic or required. Some name it in their definition; for others it is simply how they have always been made.
Still cider
Cider with no perceptible dissolved carbon dioxide, presented as a fermented fruit drink whose texture rests on body, acid and tannin alone.
Medium cider
Cider carrying enough residual or added sugar to be perceptible without dominating, the commonest sweetness level in British retail.
Unfiltered cider
Cider packaged without filtration, retaining suspended yeast and fine solids and the body and aroma that come with them.
Cidre doux
The sweet tier of the French cider scale, defined since 2025 by a density at or above 1.024 together with an acquired strength no greater than 3% vol, so that the sweetness is demonstrably unfermented juice sugar.
Keeved cider
Cider clarified before fermentation by a pectin gel that strips nutrients from the juice, producing a slow ferment that stops naturally with sugar still in solution.
Quebec ice cider
Ice cider made under Quebec’s reserved designation, which sets out how the juice may be concentrated, what may be added and what the finished product must contain.
Hopped cider
Cider dry-hopped or hopped in process, borrowing aroma and bitterness from a brewing ingredient to supply what low-tannin apples cannot.
Ice perry
Perry made from pear juice concentrated by freezing, in which the fruit’s unfermentable sorbitol adds to the residual sweetness the arrested ferment leaves behind.
More on cold maturation
It is worth separating this record clearly from cold stabilisation, because they involve the same physics and are not the same operation. Cold stabilisation is a treatment: the cider is chilled hard, held at a defined low temperature for a defined period specifically to precipitate what would otherwise precipitate later, and then racked or filtered off the deposit before being warmed. It is a stabilisation step with a pass condition. Cold maturation is a way of keeping cider — cool, quiet, undisturbed, for as long as it suits the maker — during which settling and clarification happen as consequences rather than as targets. A cider can be cold-matured all winter and still not be cold-stable, because it was never taken cold enough for long enough to force the issue.
The seasonal version of this is older than any refrigeration and shaped how traditional cider is made. Fruit is milled in autumn, fermentation runs into the cold months, and the cellar temperature falls with the weather. A ferment that was vigorous in October is barely moving by January, and a cider with sugar left in it in a cold barn stays that way until spring. Traditional makers in Normandy, the West Country and the Basque and Asturian llagares all worked to that rhythm, and the practice of racking a slow, cold cider repeatedly through the winter to keep it from finishing dry depends on the temperature as much as on the racking. The modern refrigerated equivalent gives the same effect on demand, which is convenient but also removes the pressure that made makers pay attention to timing.
The important limitation is that cold suppresses organisms without eliminating them. A sweet cider held cold is stable only while it is cold, and warming it — in a delivery van, on a shelf, in a customer’s kitchen — releases the yeast to resume work on the sugar that is still there. A maker who is relying on cold to hold a medium or sweet cider therefore has to be honest about whether the cold chain will actually hold from cellar to glass, and if it will not, the cider needs filtering, pasteurising or stabilising instead. The other thing to watch for is that a long cold rest on a compacted deposit in a sealed vessel is exactly the situation in which reduction develops, and cold makes the maker less likely to notice, because volatiles are less obvious in a chilled sample.
Related processes
Steps that sit alongside this one, replace it, or depend on it having been done.
Stabilisation
Cold stabilisation
Holding cider cold before packaging so that anything which would fall out of solution in a cold warehouse falls out in the tank instead.
Maturation
Racking
Moving cider off the sediment it has thrown, which both cleans the liquid and — by taking yeast and nitrogen away with the deposit — slows what is left of the ferment.
Juice treatment
Juice settling
Letting freshly pressed juice stand cold and undisturbed so that gross solids fall, then racking the cleaner juice off the deposit before pitching.
Stabilisation
Fining
Adding a reactive agent that binds a target colloid and carries it to the bottom, chosen according to whether the problem is tannin, protein or a phenolic taste fault.
Maturation
Tank maturation
Resting cider in stainless steel or a lined vessel, where the point of the container is that it contributes nothing and admits almost no oxygen.
Storage
Cellar storage
Holding packaged cider in conditions that let it change slowly and predictably, where stability of temperature matters more than the temperature itself.
What people ask next
Questions readers ask about the things this page mentions. Each one goes to the section that answers it rather than to a page written to receive the question.
- Is cider vegan — Cider itself is a plant product, but some producers clarify it with animal-derived finings such as gelatine, isinglass or chitosan. Vegan status therefore depends on the fining regime, which is why some ciders are certified and others are not.
- How should i store cider — Cool, dark and at a steady temperature. Light causes light-strike in clear glass, warmth accelerates oxidation, and temperature swings push cider past the closure of a bottle that is not tightly sealed.
- What is racking in cider making — Racking is siphoning cider off the sediment it has thrown into a clean vessel, leaving the lees behind. It clarifies the cider and, in traditional practice, is also used to slow a ferment by removing yeast with the lees.
- Which yeast ferments cider — Saccharomyces cerevisiae finishes almost every cider fermentation, whether it was pitched or arrived from the press house. In a spontaneous ferment it is not the first organism present, only the one that survives the alcohol it makes.
- Why did my cider stop fermenting — The usual causes are a shortage of yeast-available nitrogen, a temperature that has dropped, too much sulphite at the start, or a yeast that has reached its alcohol limit. Check the gravity before assuming anything is wrong: many ciders simply finish.
- What is keeved cider — A cider made naturally sweet by starving the yeast rather than by adding sugar. Keeving strips nutrients out of the juice before fermentation, so the ferment slows and stops with fruit sugar still in it, and nothing has been put back.
Where to go next
- How cider is made — The whole sequence, stage by stage, with the choices open at each one.
- Cider science — The chemistry and microbiology the methods on this page rest on.
- Troubleshooting — What goes wrong, how to recognise it, and whether it can be reversed.
Sources
What this page rests on. Where a source is marked as registered rather than read, CiderHQ is recording that the body is authoritative on the subject without claiming to have worked through the document itself. See our evidence policy for what each state means.
Cider and perry production technical training material
Peter Mitchell / Cider and Perry Academy · reference work · registered as competent for this subject
Searched again on 2026-08-25 and it remains the one printed source here that a bibliographic check cannot fix, because it is not a published work with an edition. It is course material issued to participants of a training programme, so there is no catalogue record to verify, no ISBN, and no lawful public copy. Its state stays `registered` for that reason rather than through inattention.
The New Cider Maker’s Handbook: A Comprehensive Guide for Craft Producers
Claude Jolicoeur, Chelsea Green Publishing, 2013. ISBN 9781603584739 · reference work · bibliographic record verified, not opened 2026-08-25
Bibliographic record verified on 2026-08-25 against the Open Library union catalogue: Chelsea Green Publishing, 2013, ISBN 9781603584739, one edition recorded. That establishes the citation points at a real book in a stated edition, which is what a citation needs and is all it establishes. No copy was opened and nothing is quoted from it. The book itself is in print and not digitised in any open collection; where CiderHQ needs a figure from this territory it uses an accessible research source instead and says so.
The Science of Cidermaking and associated technical writing
Andrew Lea · reference work · passage verified 2026-08-24
Written by a food chemist who worked at Long Ashton on apple phenolics. Unusual among specialist cider writing in that it is primary-research-adjacent: the author is describing work he did, and cites the literature. This is why it is registered at tier 1 for chemistry while a general cider book is not.