Perry pear
Blakeney Red
The most widely planted perry pear of the Three Counties, taking its name from the Gloucestershire village of Blakeney and grown for perry, for canning and, during the First World War, for dye.
Also written Blakeney, Blakeney Red Pear.
- Classification
- Medium sharp — Perry pear classification
- Harvest
- Mid (Late September to mid October)
- Single varietal
- Established as a single-varietal cider
- Blend role
- Bulk juice, Acid lift, Aroma
- Origin
- Blakeney, Forest of Dean, Gloucestershire
- Species
- Pyrus communis
- Flowering
- Mid flowering band
- Vigour
- Vigorous
- Biennial bearing
- Markedly biennial — heavy and light years alternate
- Keeping
- Poor — mill soon after picking
How it is classified
Perry pear classification
Medium sharp
Moderate acid with low to moderate tannin.
Placed as medium sharp on moderate acid with low tannin. Descriptive accounts vary in how much tannin they credit it with, and fruit left to over-ripen before milling reads softer than the class implies.
Every classification on CiderHQ names its system. Why there is more than one.
What it contributes to a blend
A direction, not a measurement. These bands are the level of resolution the evidence supports, and they say which way adding this fruit pushes a blend rather than what the finished cider will be.
| Axis | Typical | Range |
|---|---|---|
| Acid | Moderate | |
| Tannin | Light | |
| Sugar | High | |
| Bitterness | Slight | |
| Astringency | Noticeable | |
| Aroma | Present | |
| Body | Medium |
The medium-sharp placement in the Long Ashton perry pear account, read alongside the National Perry Pear Centre’s descriptive material.
Soft red-flushed fruit giving a juice of moderate acidity and light grip, with a fresh pear character that fades quickly if the fruit is milled late.
Aroma
No aroma descriptors are recorded for Blakeney Red, and for a great deal of cider fruit that is a finding rather than a gap. Bittersweet apples in particular contribute tannin, sugar and body while being close to aromatically mute, and most of what a cider made from them smells of was produced by the fermentation rather than carried in by the fruit. CiderHQ publishes the absence rather than filling the space with descriptors nothing supports.
Measured analysis
Each figure is shown with where and when it was taken. They are not averaged: the same cultivar grown in another climate genuinely gives different numbers, and collapsing them into one would be the most misleading thing this page could do.
| Property | Reading | Where | When | Source |
|---|---|---|---|---|
| Specific gravity4 readings, spanning 1.051–1.070 SG | 1.056 SG | Long Ashton Research Station, near Bristol, North Somerset, England | 1903–1963Historic analysis | National Association of Cider Makers, Archive of Cider Pomology |
| 1.070 SG | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2022Modern analysis | Cider and Perry Academy (Peter Mitchell) | |
| 1.060 SG | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2022–2024Modern analysis | Cider and Perry Academy (Peter Mitchell) | |
| 1.051 SG | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2024Modern analysis | Cider and Perry Academy (Peter Mitchell) | |
| Titratable acidity3 readings, spanning 3.9–4.5 g/L | 4.2 g/L | Long Ashton Research Station, near Bristol, North Somerset, England | 1903–1963Historic analysis | National Association of Cider Makers, Archive of Cider Pomology |
| 4.5 g/L | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2022Modern analysis | Cider and Perry Academy (Peter Mitchell) | |
| 3.9 g/L | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2024Modern analysis | Cider and Perry Academy (Peter Mitchell) | |
| Total tannin3 readings, spanning 130.0–1170.0 mg/L | 130.0 mg/L | Long Ashton Research Station, near Bristol, North Somerset, England | 1903–1963Historic analysis | National Association of Cider Makers, Archive of Cider Pomology |
| 1170.0 mg/L | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2022Modern analysis | Cider and Perry Academy (Peter Mitchell) | |
| 480.0 mg/L | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2024Modern analysis | Cider and Perry Academy (Peter Mitchell) | |
| Free amino nitrogen2 readings, spanning 8.2–21.4 mg/L | 21.4 mg/L | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2022Modern analysis | Cider and Perry Academy (Peter Mitchell) |
| 8.2 mg/L | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2024Modern analysis | Cider and Perry Academy (Peter Mitchell) | |
| Phenolic acids2 readings, spanning 160.0–260.0 mg/L | 260.0 mg/L | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2022Modern analysis | Cider and Perry Academy (Peter Mitchell) |
| 160.0 mg/L | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2024Modern analysis | Cider and Perry Academy (Peter Mitchell) | |
| Proline2 readings, spanning 37.7–87.0 mg/L | 87.0 mg/L | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2022Modern analysis | Cider and Perry Academy (Peter Mitchell) |
| 37.7 mg/L | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2024Modern analysis | Cider and Perry Academy (Peter Mitchell) | |
| Total amino acids2 readings, spanning 64.5–121.7 mg/L | 121.7 mg/L | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2022Modern analysis | Cider and Perry Academy (Peter Mitchell) |
| 64.5 mg/L | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2024Modern analysis | Cider and Perry Academy (Peter Mitchell) | |
| Total phenolics2 readings, spanning 650.0–1430.0 mg/L | 1430.0 mg/L | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2022Modern analysis | Cider and Perry Academy (Peter Mitchell) |
| 650.0 mg/L | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2024Modern analysis | Cider and Perry Academy (Peter Mitchell) | |
| pH | 3.57 pH | Gloucestershire, Herefordshire, Worcestershire and neighbouring counties, England | 2022–2024Modern analysis | Cider and Perry Academy (Peter Mitchell) |
| Sorbitol | 10.0–30.0 g/L | Various growing sites; the literature pools pear juice analyses rather than reporting by orchard | — | Various journals and institute reports |
8 properties here have been measured more than once. The readings are shown as they were taken and are deliberately not averaged — climate, season, ripeness at picking, the age of the tree and the analytical method all move these numbers, and a single figure would hide every one of them. Where a spread is given below a property, it is the distance between separate studies, not the variation within any one of them.
How these were measured
- Juice density. Published by the source in the four-figure form (1058) and written here in full.
- Titration, reported as malic acid. Published as a percentage and stored here in grams per litre by exact conversion — one per cent weight per volume is ten grams per litre — so that the historic figures sit in one column with the modern survey the site also holds.
- Löwenthal permanganate titration. Published as a percentage and stored here in milligrams per litre by exact conversion — one per cent weight per volume is ten thousand milligrams per litre — so that the historic figures sit in one column with the modern survey the site also holds.
- Juice pressed from fruit collected in the Three Counties and frozen before analysis. Published to five decimal places and shown at the three the site displays.
- Titration, reported as malic acid.
- “True tannin” — the polymerised phenolic fraction, measured separately from the phenolic acids. Published in grams per litre and stored here in milligrams per litre by exact conversion.
- Phenolic acids measured separately from the tannin fraction. Published in grams per litre and stored here in milligrams per litre by exact conversion.
- The sum of the true tannin and phenolic acid fractions as the surveyor reports it. Published in grams per litre and stored here in milligrams per litre by exact conversion.
- HPLC. The whole amino acid pool by mass, assimilable and non-assimilable together.
- Free amino nitrogen, calculated from the individual amino acids as nitrogen available to yeast. Excludes proline.
- HPLC.
- Juice gravity of the separate batch taken for the single-variety fermentation trial, before any sugar adjustment.
- Meter on the fermentation-trial juice before adjustment.
- A general figure for pear juice, not an analysis of Blakeney Red. It is recorded here because the unfermentable fraction is what makes a fully fermented Blakeney Red perry taste sweeter than a fully fermented cider, and no per-cultivar sorbitol analysis for this pear has been verified. The range is not tied to a single study or season.
- Long Ashton perry pear analyses, reaching CiderHQ through a National Association of Cider Makers report compiled in 2010 from the station’s material. The underlying volume is Luckwill and Pollard, Perry Pears (University of Bristol, 1963), which CiderHQ has verified bibliographically and not opened. The compiler warns that juice quality in perry pears improves markedly with tree age, and that young trees give weaker acid and tannin and a lower gravity. A single figure for a perry pear is therefore a figure for a tree of some unstated age.
- Long Ashton perry pear analyses, reaching CiderHQ through a National Association of Cider Makers report compiled in 2010 from the station’s material. The underlying volume is Luckwill and Pollard, Perry Pears (University of Bristol, 1963), which CiderHQ has verified bibliographically and not opened. A permanganate figure, not comparable with a Folin–Ciocalteu total-phenolics figure.
- One sample from one source in one season. The surveyor reports the same variety differing markedly between years, sites and tree types, and publishes the samples separately rather than pooling them.
- Measured as “true tannin” — the polymerised phenolic fraction — separately from the phenolic acids. It is not a Folin–Ciocalteu total and not a permanganate total, and should be compared only with figures produced the same way.
- Perry pear juice runs far lower in assimilable nitrogen than cider apple juice, a difference the Long Ashton workers reported and this survey confirms across most of the varieties sampled. Several readings here sit below the level at which a ferment is generally expected to need feeding.
- Proline is an amino acid a wine or cider yeast cannot assimilate without oxygen, so it does not count towards usable nitrogen. In these pear juices it routinely exceeds the whole assimilable amino pool, which is why a perry must can be rich in amino acids and starved of nitrogen at the same time.
- The four fermentation trials were chaptalised by differing amounts to hit a common alcohol target, so the finished strengths are not a property of the fruit and CiderHQ does not record them as measurements. The juice gravity and juice pH below are measurements of the juice as pressed, before any adjustment.
Compare within a study to see where these figures sat among the other cultivars the same work analysed — which is a more robust statement than the figures themselves, because absolute values move between laboratories and the ordering inside one study mostly survives.
Watched in the orchard
What named research programmes recorded about this fruit at their own sites. Bloom, harvest and cropping belong to a place and a run of seasons rather than to a cultivar, so they are reported site by site rather than merged.
Long Ashton perry pear varieties
Long Ashton Research Station, near Bristol, North Somerset, England · 1903–1963 · National Association of Cider Makers, Archive of Cider Pomology
Maritime and mild. The station sat outside the perry counties it studied — the pears are Gloucestershire, Herefordshire and Worcestershire fruit — which is worth holding in mind when a figure here is compared with one measured on fruit picked in the Three Counties.
- Harvest
- Late September to early October
- Growth habit
- Medium–large
- Bearing
- Heavy
- Held as
- Listed as “Blakeney Red”
Medium acid and tannin, pleasant average quality. Variable, depending on maturity.
Recorded by the programme from professional cidermakers in the region. One panel, one place, one set of seasons — a description of these ciders rather than of the cultivar everywhere.
Juice analysis: specific gravity, acidity by titration as malic acid, tannin by Löwenthal permanganate titration. Acid and tannin are published as percentages and stored here in grams per litre by exact conversion. Vigour, cropping habit, maturity window and a vintage quality assessment are the compiler’s summary of the station’s descriptions.
Three Counties perry pear juice survey
Gloucestershire, Herefordshire, Worcestershire and neighbouring counties — the perry country itself, rather than a research station elsewhere · 2022–2024 · Cider and Perry Academy (Peter Mitchell)
The lower Severn and Wye vales: mild, wet, and the only ground in Britain where perry pears have ever been grown at scale. Fruit was collected across three autumns, and the survey reports each collection separately rather than pooling the seasons.
- Held as
- Sample BR-Oct22
Final gravity 1.00898 and 6.59% ABV — much the highest residual density of the four. The surveyor attributes it to unfermentable sorbitol rather than to a stalled ferment, and notes the sorbitol was not measured directly.
Recorded by the programme from professional cidermakers in the region. One panel, one place, one set of seasons — a description of these ciders rather than of the cultivar everywhere.
Juice from single varieties, frozen before analysis. Specific gravity; titratable acidity by titration as malic acid; “true tannin” and phenolic acids measured as separate fractions; individual amino acids by HPLC, with free amino nitrogen calculated from them and proline reported apart because yeast cannot assimilate it anaerobically. Where samples differed by location, tree age or year, they are reported separately.
Three Counties perry pear juice survey
Gloucestershire, Herefordshire, Worcestershire and neighbouring counties — the perry country itself, rather than a research station elsewhere · 2022–2024 · Cider and Perry Academy (Peter Mitchell)
The lower Severn and Wye vales: mild, wet, and the only ground in Britain where perry pears have ever been grown at scale. Fruit was collected across three autumns, and the survey reports each collection separately rather than pooling the seasons.
- Held as
- Sample BR-Oct24
Juice from single varieties, frozen before analysis. Specific gravity; titratable acidity by titration as malic acid; “true tannin” and phenolic acids measured as separate fractions; individual amino acids by HPLC, with free amino nitrogen calculated from them and proline reported apart because yeast cannot assimilate it anaerobically. Where samples differed by location, tree age or year, they are reported separately.
In the orchard
- Harvest window
- Mid
- Flowering
- Mid flowering band
- Vigour
- Vigorous
- Cropping
- Markedly biennial — heavy and light years alternate
- Keeping
- Poor — mill soon after picking
Late September into early October in the Three Counties. The window is short: the fruit is ready when it begins to drop and is past use within about a week of that, a pattern that holds across most perry pears and is sharper here than in later cultivars. The National Perry Pear Collection records it ripening in the first half of October at Hartpury, which agrees with the window recorded here.
Heavy years alternate with light ones on mature standards. The pattern is less pronounced than in Barland or Butt but is enough that a single-orchard perry maker cannot plan on an even supply.
Days rather than weeks. Fruit gathered from the ground must go to the mill more or less at once; held in a heap it browns from the core outwards and the juice loses its freshness before it is pressed.
Flowers in the middle of the pear season. Like most perry pears it sets poorly on its own pollen, so a solitary tree in a garden crops erratically where the same tree in a mixed orchard does not. The National Perry Pear Collection places it in the mid flowering band, from flowering records kept over many seasons.
Pears are not self-fertile. A variety needs another in blossom at the same time to set fruit, which is why the flowering band matters more in a perry orchard than the harvest window does.
Ripening moves with the site and the season. Where the National Perry Pear Collection’s observation at Hartpury falls in a different band from the window recorded here, both are kept rather than one overwriting the other.
Disease and pest susceptibility
| Issue | Susceptibility | Note |
|---|---|---|
| Pear scab | moderate | Scab marks the fruit and, in wet seasons, splits the skin, which brings rot forward in a cultivar that already has little margin. |
| Self-incompatibility | high | Needs a compatible pollinator flowering at the same time. This is a general property of perry pears rather than a defect peculiar to this one. |
Juice and pressing
- Moderate acid with light tannin
- Pink to red juice from the skin flush when milled whole
- Ferments readily and clears without much difficulty
How it is used
- The mainstay of Three Counties perry blending, both as a base and as the whole of a single-variety perry.
- Canned and bottled as fruit through the twentieth century, one of very few perry pears with a fresh-fruit trade behind it.
- Used during the First World War as a source of dye for khaki cloth, a use recorded for this cultivar specifically.
On its own
Established as a single-varietal cider
Single-variety Blakeney Red perry is long established and is what many people in the Three Counties mean by perry without qualification. The result is light and fairly quick to mature rather than structured, and it does not reward long keeping.
About Blakeney Red
Blakeney Red is the pear a Three Counties perry orchard is most likely to be built around. It takes its name from Blakeney in the Forest of Dean, where the tradition places its origin, and it spread across Gloucestershire, Herefordshire, Worcestershire and into Monmouthshire in sufficient numbers that it is now the cultivar most often found standing in a neglected orchard. That ubiquity is the reason for its prominence here: it is not the most structured perry pear, nor the most highly regarded by makers who want tannin, but it is the one that survived in quantity.
The juice is moderately acidic with little tannin, which places it as medium sharp under the perry pear scheme. In practice it gives a light, fresh perry that comes together quickly and is drinkable young. What it does not give is grip, and a maker wanting structure blends it with a Butt, a Barland or a Winnal’s Longdon rather than pressing it alone. Its sorbitol, like that of any pear, survives fermentation intact, so a Blakeney Red perry fermented out by the yeast still tastes appreciably sweet — a fact that regularly misleads people into thinking the ferment stopped early.
Its history runs unusually wide for a perry pear. The fruit was canned and bottled commercially, giving it a market outside drink, and during the First World War it was used as a source of dye for khaki cloth. Both uses depended on the same thing: a large, reliable, red-fleshed crop from trees that needed almost no attention. Neither use survives, but they explain why Blakeney Red was planted in numbers that the more interesting perry pears never reached.
The trees are large, long-lived standards, and a mature Blakeney Red is a substantial piece of orchard furniture rather than a fruit bush. Cropping alternates between heavy and light years on older trees. The harvest window is short even by perry pear standards — the fruit is gathered as it falls and is past use within about a week — which is one of the practical reasons perry has never scaled the way cider has.
Names, origin and identity
Cultivar naming is the hardest problem in cider fruit data. The same tree carries different names across ten miles, and two different trees have shared a name for two centuries.
Origin · traditional account
The association with Blakeney is parish tradition rather than a documented raising. No record names a raiser, a date or a parent tree, and the cultivar was already widespread by the time anyone wrote it down.
| Name | Kind | Note |
|---|---|---|
| Circus | Regional name | Recorded as a synonym of Blakeney Red by the National Perry Pear Collection. |
| Painted Pear | Regional name | Recorded as a synonym of Blakeney Red by the National Perry Pear Collection. |
| Red Pear | Disputed identity | The National Perry Pear Collection records this name for Blakeney Red, and also for Red Pear — a variety the collection holds as distinct and has separated by DNA. |
| Circus Pear | Regional name | Forest of Dean. A Forest of Dean name for the same fruit, recorded alongside the Blakeney name rather than in place of it. |
| Painted Lady | Disputed identity | The name Painted Lady has been attached to Blakeney Red in some accounts. CiderHQ keeps Painted Lady as a separate record and marks the equation as unresolved rather than adopting it. |
The National Perry Pear Collection’s identifications are supported by DNA analysis of the trees it holds, which is why they are treated here as the stronger account where they conflict with a documentary one. Where the collection records a name for two varieties it holds as distinct, the name identifies a group of trees rather than one variety, and fruit offered under it needs checking against something other than its label.
Why it matters
- The commonest surviving perry pear in the Three Counties, and consequently the cultivar most orchard restoration schemes plant first.
- One of the very few perry pears whose economic history runs beyond drink, through canning and wartime dye.
Related cultivars
Recorded relationships, including the ones this fruit is routinely confused with.
Often confused with
Painted Lady
The two names have been used for one another in parts of Gloucestershire. CiderHQ keeps them apart and records the confusion rather than deciding it.
Often confused with
Red Pear
Red-fruited perry pears are routinely lumped together in orchard records, and Blakeney Red absorbs other red pears in casual naming.
Similar role
Dymock Red
Another red-fruited Gloucestershire pear used in the same part of a blend, though from a much smaller surviving population.
Fruit that plays a similar part
Cultivars sharing a classification under the same system and a comparable role in a blend. Not a similarity score — a stated relationship.
Gregg’s Pit
A Herefordshire perry pear named after the Much Marcle holding where the original tree still stands, and one of the few perry pears whose parent tree can be visited.
Hendre Huffcap
The most highly regarded of the Huffcap group of perry pears, taking its first name from a Monmouthshire farm and its second from a word for a drink strong enough to lift a hat.
Moorcroft
An early Malvern-country perry pear, known as Malvern Hills as often as by its own name, and at the centre of one of the sharpest identity disputes in perry.
Stinking Bishop
A Dymock perry pear named after a nineteenth-century grower called Bishop, and now better known through the washed-rind cheese that is bathed in its perry.
Thorn
One of the oldest named English perry pears, recorded in the seventeenth century and still valued for a quick, light perry that is ready before most others.
Berllanderi Green
A Monmouthshire perry pear named after the farm near Raglan where it was found, and known from a very small number of trees.
Styles it is characteristic of
Perry
The fermented drink of pears, a tradition parallel to cider rather than derived from it, in which unfermentable sorbitol leaves a sweetness the maker never chose.
Bottle-conditioned perry
Perry that completes its fermentation in the sealed bottle, generating carbonation and lees character while the fruit’s sorbitol keeps a sweetness the yeast cannot remove.
Sparkling perry
Perry carrying a persistent bubble, a presentation that suits pear’s aromatics and residual sorbitol and has a documented history going back to the seventeenth century.
Still perry
Perry without carbonation, in which the fruit’s sorbitol sweetness and its texture carry a drink that has no bubble to lean on.
Three Counties cider
The shared cider and perry tradition of Herefordshire, Gloucestershire and Worcestershire, defined by a common fruit inventory and by the perry pear orchards that survive nowhere else in comparable numbers.
Welsh cider
Cider from Wales, rebuilt over recent decades from a nearly lost tradition, with protected names for traditional Welsh cider and perry and a fruit inventory shared with the English border counties.
Where it grows
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.
- What is perry — Perry is an alcoholic drink made by fermenting the juice of pears, traditionally of specific perry pear cultivars rather than eating pears. It is to pears what cider is to apples, and has its own history in the three counties of England and in Normandy.
- How are apples milled for cider
- When are cider apples harvested — In the northern hemisphere the cider harvest runs from about September to November, with late bittersweets such as Dabinett and Vilberie coming in last. Cider fruit is generally picked riper than dessert fruit, and often gathered from the ground.
- What is juice blending
- How are perry pears classified — Perry pears are conventionally divided by acid and tannin into sweet, medium sharp, bittersharp and bittersweet, following the scheme used in the English perry literature. Sorbitol content matters too, and it does not appear in the classes.
- What is bottle conditioned perry
Where to go next
- How cider apples are classified — Why there are four schemes and none of them is universal.
- The blend explorer — See which way changing the proportions moves a blend.
- Blending — What a cider maker is actually deciding when they build a blend.
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.
Perry Pears
L. C. Luckwill and A. Pollard (eds), published for the National Fruit and Cider Institute by the University of Bristol, 1963 · reference work · bibliographic record verified, not opened 2026-08-25 · covers 1963
Bibliographic record verified on 2026-08-25 against Open Library, which records the work as Luckwill, 1963, published for the National Fruit and Cider Institute by the University of Bristol. The catalogue entry names Luckwill alone where the standard citation names Luckwill and Pollard as joint editors; CiderHQ keeps both names and records the discrepancy rather than silently following one catalogue. This is the foundational descriptive work on English perry pears and the ancestor of most later variety lists. No copy was opened: it is sixty years old, out of print, and held in research libraries rather than in open digital collections.
National Perry Pear Centre, Hartpury · specialist organisation · passage verified 2026-08-24
Read on 2026-08-24 — and the address CiderHQ had registered, perrypears.co.uk, is no longer the Centre at all. It fails the TLS handshake over https, and over plain http it resolves to a Sedo domain-parking page: an earlier pass in this sprint recorded it as retrieved on the strength of an HTTP 200, which was wrong, and the correction is the point. The Centre publishes at nationalperrypearcentre.org.uk. It is the closest thing British perry has to an identity authority: it holds at least two examples of most known varieties, states that the DNA of most of them has been determined and is used as an aid to identification, and publishes a variety register with synonym lists. Its 121-variety register is transcribed into the perry pear records, including the nineteen names it shows being claimed by more than one variety.
Gloucestershire Orchard Trust · specialist organisation · retrieved 2026-08-24
Three Counties Cider and Perry Association
TCCPA · specialist organisation · retrieved 2026-08-24
Research on pear juice composition and sorbitol in perry
Various journals and institute reports · peer-reviewed literature · registered as competent for this subject
The evidence base for the single most important chemical difference between cider and perry: pears carry substantial sorbitol, which yeast does not ferment, so a fully fermented perry retains sweetness a fully fermented cider cannot.
Research Evidence standard for this record. What that means.