History · Eighteenth century to present
The history of classifying cider fruit
Who decided cider apples are bittersweet or bittersharp, and does everyone use the same system?
In short
The familiar sweet, sharp, bittersweet and bittersharp classes come from the Long Ashton research programme in England, which sorted fruit by measured acid and tannin in order to guide blending. France, Spain and the perry pear literature each developed different schemes for different purposes.
No scheme is universal, and none should be used without naming it. A cultivar can classify differently under two systems, and the same cultivar grown in a different climate can move class within one system.
Before measurement: the pomonas
The earliest attempts to organise cider fruit were descriptive. Seventeenth-century writers grouped apples by reputation and by the cider they were said to make; eighteenth- and nineteenth-century pomonas described fruit by appearance, season, tree habit and use, illustrated it, and recorded the local names it went by.
This work was indispensable and is still consulted, because it preserves nomenclature and describes trees that have since disappeared. But it could not compare fruit across regions. A description of a cider as strong or rough tells a reader nothing that can be set against another writer’s description of another fruit.
The nineteenth century also inherited a naming problem that description alone could not solve. The same cultivar carried different names in adjacent valleys, and different cultivars carried the same name, which is why cultivar identity and cultivar classification became entangled and to some extent still are.
Long Ashton: two axes and a purpose
The scheme that dominates English-language cider writing came out of the National Fruit and Cider Institute at Long Ashton, which analysed juice from hundreds of cultivars grown at its Somerset site. It sorted fruit on two measured axes — titratable acid, reported as malic acid, and tannin — and divided each at a threshold to produce four classes: sweet, sharp, bittersweet and bittersharp.
The choice of two axes was not arbitrary. Acid and tannin are the two components a blender most needs to control, because acid governs both freshness and microbiological safety while tannin governs bitterness, astringency and the capacity to age. Sugar was measured too, but it varies so much with season and ripeness that it makes a poor basis for classification.
The scheme was built to answer a specific question: what should be blended with what to make a balanced West Country cider. It answers that question well. It does not tell a reader how a cider will taste, and it was never intended to.
| Scheme | Sorts fruit by | Built to answer | Known limits |
|---|---|---|---|
| Long Ashton (England) | Measured acid and tannin, each above or below a threshold | What to blend with what for a balanced West Country cider | Says nothing about aroma or finished flavour; figures are of Somerset-grown fruit and move with climate |
| French families | Sweetness, bitterness and acidity, giving douce, douce-amère, amère and acidulée | Assembling a Normandy or Breton blend, and matching fruit to keeving | Boundaries differ from the English thresholds, so cultivars do not map one-to-one |
| Asturian classification | Acid and bitterness categories within the designation’s permitted varieties | Which fruit may be used, and in what proportion, for sidra natural | Tied to a specific designation and its variety list rather than general description |
| Perry pear classification | Acid and tannin in pear juice, with vintage quality noted separately | Describing and grouping English perry pears | Pears carry sorbitol and citric acid, so apple categories transfer badly |
The continental schemes
French classification developed independently and around a partly different problem, because Normandy and Brittany practise keeving and need fruit whose nitrogen and pectin behaviour suits it. The families of douce, douce-amère, amère and acidulée fruit sort by sweetness, bitterness and acidity, and the class boundaries do not coincide with the English thresholds.
Spanish classification, and in particular the framework attached to Asturian sidra natural, works from a defined list of permitted varieties grouped by acid and bitterness. Its purpose is regulatory as much as descriptive: it governs what may go into a protected product, which is a different job from advising a blender.
Perry pears required their own treatment, and got it from the same Long Ashton tradition. Pear juice contains sorbitol, which is largely unfermentable, and a significant proportion of citric acid alongside malic, so the categories that work for apples do not transfer cleanly.
Competition frameworks and the modern position
A newer kind of classification sorts finished drinks rather than fruit. Competition style guidelines exist to give judges a consistent basis for assessment, and they group ciders by origin, sweetness, carbonation and production method. They are useful for what they are, and are sometimes mistaken for a taxonomy of cider itself.
The historical lesson holds across all of them. Each scheme encodes the question its authors had — blend this fruit, protect this product, judge this class — and each carries the climate and the cultivars it was built from. A classification is a tool, and using one outside its intended job produces confident answers that are wrong.
This is why CiderHQ never records a class without naming its system, and records a cultivar’s classification as an array of system-scoped statements rather than as a single property of the fruit.
How this developed
Certainty is marked on each entry. Where the popular account runs ahead of the evidence, that is said rather than smoothed over.
Eighteenth and nineteenth centuries
Descriptive pomonas
Cider fruit is organised by description, illustration and reputation, preserving names but permitting no comparison between regions.
From 1903
Measurement at Long Ashton
Systematic juice analysis of cider cultivars provides the acid and tannin figures on which the English classification is built.
Twentieth century
The four-class scheme in general use
Sweet, sharp, bittersweet and bittersharp become the standard English vocabulary for cider fruit.
1963
Perry pears described systematically
The Long Ashton perry pear survey establishes the reference description and grouping of English perry pears.
Twentieth century onwards
French and Spanish frameworks
Continental classifications develop around their own production methods and, in Spain, around protected designation requirements.
Also answered on this page
Questions this page covers, so you can tell at a glance whether it is the one you want.
- What does bittersweet mean for a cider apple?
- Do the French use the same cider apple categories as the English?
- Are perry pears classified like cider apples?
Related
Places
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.
- How old is cider in asturias — Apple orchards and cider appear in Asturian documents from the medieval period onwards, and by the early modern centuries cider was the ordinary drink of much of the region — a matter of climate and land as much as of custom, since northern Spain grows apples far better than it grows vines.
- How old is perry and where does it come from — Perry — fermented pear juice, made from tannic and often inedible perry pears rather than from dessert fruit — is recorded in England from the medieval period and was made across northern France and the Low Countries as well. Its English heartland is a small area of Gloucestershire, Herefordshire, Worcestershire and the Welsh border where the soils and climate suit the trees.
- What was long ashton research station and why does it matter to cider — The National Fruit and Cider Institute opened at Long Ashton, near Bristol, in 1903, to apply laboratory analysis to an industry that had until then run entirely on custom. It became part of the University of Bristol, was renamed Long Ashton Research Station, and worked on cider fruit, juice chemistry, fermentation and orchard practice for most of the twentieth century.
- Why are cider apples called bittersweet and bittersharp — Because a research station in Somerset sorted them that way. Long Ashton analysed pressed juice for total acid and for tannin, set a threshold on each, and placed every fruit in one of the four resulting quadrants: sweet, sharp, bittersweet and bittersharp.
- Why does normandy make cider instead of wine — Northern France did grow vines in the Middle Ages. Over the following centuries the region shifted decisively to orchards, under pressure from a cooling climate, from better and cheaper wine reaching northern markets by river and sea, and from the simple fact that apples cropped more reliably on Norman land.
- What is asturian cider
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.
Long Ashton Research Station cider fruit analyses
National Fruit and Cider Institute / University of Bristol · research institute · registered as competent for this subject · covers 1903–2003
The foundational body of cider-fruit science in English. Long Ashton produced the acid-and-tannin classification that divides cider apples into sweet, sharp, bittersweet and bittersharp, and analysed hundreds of cultivars grown at its Somerset site. Its figures are historic measurements of specific fruit at a specific place, not universal constants — a distinction CiderHQ preserves in every measurement record that cites it.
Institut Français des Productions Cidricoles (IFPC)
IFPC · research institute · retrieved 2026-08-24
The French technical institute for cider production. The authority for the French cultivar classification families, for keeving as an industrial process, and for the pectin and nitrogen chemistry that keeving depends on.
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.
Where to go next
- The history of cider — The rest of the history, by period and by tradition.
- Cider culture — What survived from this history and is still practised.
- Regions — The places this happened in, and what they make now.