Cider apple
Chisel Jersey
A hard, high-tannin Somerset bittersweet used in small proportion for structure, and one of the fruit most often reached for when a blend needs backbone rather than bulk.
Also written Chissel Jersey, Chisel.
- Classification
- Bittersweet — Long Ashton classification
- Harvest
- Late (Late October)
- Single varietal
- Not suited to a single-varietal cider
- Blend role
- Tannin and structure, Bittersweet base, Late season
- Origin
- Martock, Somerset
- Species
- Malus domestica
- Flowering
- Pollination group 4
- Vigour
- Moderate
- Biennial bearing
- Markedly biennial — heavy and light years alternate
- Keeping
- Very good — holds in store for weeks
How it is classified
Long Ashton classification
Bittersweet
Low acid, high tannin. The class that has no real equivalent in dessert fruit and that defines West Country cider.
Basis: Below about 0.45% w/v acid and above about 0.2% w/v tannin.
A full bittersweet at the higher-tannin end of the class, well clear of any threshold.
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 | Very low | |
| Tannin | Heavy | |
| Sugar | High | |
| Bitterness | Marked | |
| Astringency | Harsh | |
| Aroma | Restrained | |
| Body | Full |
Long Ashton acid and tannin ranges, with astringency banded high on consistent description of the fruit as hard and mouth-drying.
Adds firm, drying tannin and ageing capacity, and is difficult to drink in quantity on its own.
Aroma
No aroma descriptors are recorded for Chisel Jersey, 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.
Measured on the fruit
Measured on the fruit itself, before anything was done to it. These figures hold whatever was later made from the juice.
| Property | Reading | Where | When | Source |
|---|---|---|---|---|
| Fruit diameter | 67 mm | WSU Mount Vernon NWREC, Skagit Valley, Washington, USA | 2002–2017Modern analysis | Washington State University Northwestern Washington Research and Extension Center |
| Juice yield | 511 L/t | WSU Mount Vernon NWREC, Skagit Valley, Washington, USA | 2002–2017Modern analysis | Washington State University Northwestern Washington Research and Extension Center |
Measured on the juice
Measured on juice as pressed, before fermentation. This is where most cider analysis lives and what the classification schemes are defined on.
| Property | Reading | Where | When | Source |
|---|---|---|---|---|
| Total acid3 readings, spanning 0.200–0.250 % w/v | 0.150–0.250 % w/v | Long Ashton, Somerset, England | Long Ashton analyses, 1903–1985Historic analysis | National Fruit and Cider Institute / University of Bristol |
| 0.250 % w/v | WSU Mount Vernon NWREC, Skagit Valley, Washington, USA | 2002–2017Modern analysis | Washington State University Northwestern Washington Research and Extension Center | |
| 0.220 % w/v | Long Ashton Research Station, near Bristol, Somerset, England | 1905–1975Historic analysis | Andrew Lea | |
| Total tannin3 readings, spanning 0.330–0.420 % w/v | 0.280–0.380 % w/v | Long Ashton, Somerset, England | Long Ashton analyses, 1903–1985Historic analysis | National Fruit and Cider Institute / University of Bristol |
| 0.420 % w/v | WSU Mount Vernon NWREC, Skagit Valley, Washington, USA | 2002–2017Modern analysis | Washington State University Northwestern Washington Research and Extension Center | |
| 0.400 % w/v | Long Ashton Research Station, near Bristol, Somerset, England | 1905–1975Historic analysis | Andrew Lea | |
| Brix | 13.8 °Bx | WSU Mount Vernon NWREC, Skagit Valley, Washington, USA | 2002–2017Modern analysis | Washington State University Northwestern Washington Research and Extension Center |
| pH | 4.31 pH | WSU Mount Vernon NWREC, Skagit Valley, Washington, USA | 2002–2017Modern analysis | Washington State University Northwestern Washington Research and Extension Center |
| Specific gravity | 1.056 SG | WSU Mount Vernon NWREC, Skagit Valley, Washington, USA | 2002–2017Modern analysis | Washington State University Northwestern Washington Research and Extension Center |
2 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
- Titration of pressed juice, reported as malic acid
- Permanganate titration against indigo carmine, reported as tannic acid equivalent
- Titration, reported as malic acid equivalent
- Published as 2.65 inches; converted at 25.4 mm to the inch
- Juice pressed from 25 fruit, 2015–2017 only. Published as 232 mL/lb; converted at 2.204623 lb to the kilogram
- Titration with alkali, reported as malic acid. Composite figure across many seasons; the source states neither the sample count nor the year of any individual analysis.
- Löwenthal permanganate titration, reported as tannic acid equivalent. Composite figure across many seasons; the source states neither the sample count nor the year of any individual analysis.
- Fruit from one Somerset site. Not a constant of the cultivar.
- A range rather than a value, because the per-cultivar tables are not verified against the original reports. High total tannin in this cultivar reads as hard astringency, not as soft body.
- A composite of Long Ashton analyses reaching CiderHQ through three hands: the station’s own work, a printed compilation (Bulmer’s Pomona, 1987, and Beech and Carr, 1977), and a transcription of that compilation. CiderHQ has seen only the transcription.
- A composite of Long Ashton analyses reaching CiderHQ through three hands: the station’s own work, a printed compilation (Bulmer’s Pomona, 1987, and Beech and Carr, 1977), and a transcription of that compilation. CiderHQ has seen only the transcription. A permanganate figure. It is not comparable with a Folin–Ciocalteu total-phenolics figure for the same fruit, and the two can differ by a factor of two.
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.
WSU Mount Vernon cider cultivar trial
Northwestern Washington Research and Extension Center, Mount Vernon, Skagit Valley, Washington · 2002–2017 · Washington State University Northwestern Washington Research and Extension Center
Maritime, with cool summers and mild wet winters — the closest North American analogue to the English West Country, and the reason the programme planted European cider fruit here rather than east of the Cascades.
- Mean full bloom
- 19 May
- Harvest
- 29 September
- Bloom density
- 3.3 of 5
- Productivity
- 3 of 5
- Growth habit
- –
- Bearing
- –
- Alternate bearing
- Semi alternate
- Rootstocks
- MM106
Filed here as bittersweet.
Color golden amber, full English bittersweet. Barnyard character typical of English farmhouse cider. Slight citrus & fruitiness accompanied by pronounced bitterness. Very long tannic, astringent finish. Good for structure, character & complexity in a blend.
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 characteristics measured on 250 mL of pressed juice; juice yield from 25 fruit, 2015–2017 only. Bloom density, productivity and blind wood are the site’s own subjective 1–5 ratings. Figures are means across the seasons each cultivar was in the trial.
Long Ashton composite cider apple analyses
Long Ashton Research Station, near Bristol, North Somerset, England · 1905–1975 · Andrew Lea
Maritime and mild, with wet autumns and few hard frosts — the climate the English cider cultivars were selected in, and the reason their acid and tannin figures here are the ones the rest of the world has spent a century comparing its own fruit against.
- Held as
- Listed as “Chisel Jersey”, late season
Filed here as bittersweet.
Freshly expressed juice, not finished cider. Acid by straight titration against alkali, reported as malic acid; tannin by Löwenthal permanganate titration, reported as tannic acid equivalent. Composite figures across seventy years of analyses: the source gives neither a sample count nor the year of any individual reading.
In the orchard
- Harvest window
- Late
- Flowering
- Pollination group 4
- Vigour
- Moderate
- Cropping
- Markedly biennial — heavy and light years alternate
- Keeping
- Very good — holds in store for weeks
Late October into November. The fruit is hard and holds together well through handling.
Tends to alternate, and is slow to come into full bearing.
The hard flesh stores unusually well, which makes it useful for extending a pressing season.
Late-flowering.
Disease and pest susceptibility
| Issue | Susceptibility | Note |
|---|---|---|
| Scab | moderate | — |
| Canker | moderate | — |
Juice and pressing
- Very low acid
- High, hard tannin
- Presses cleanly from firm flesh
How it is used
- A structural minority component in Somerset blends
- Used where a cider is intended to age
On its own
Not suited to a single-varietal cider
Too tannic and too low in acid to stand alone. Single-varietal attempts exist and are generally described as hard and unresolved.
About Chisel Jersey
Chisel Jersey is what a bittersweet looks like when the tannin is allowed to dominate everything else. The fruit is small, hard, greenish-yellow flushed dull red, and the flesh is dense enough that the usual explanation for the name is that you would need a chisel to get into it. Pressed alone it gives a juice that is almost devoid of acid and full of phenolic material that grips rather than rounds.
The blending logic is straightforward: a few per cent of Chisel Jersey turns a soft, broad cider into one with a defined finish and the capacity to improve in barrel. This is a different contribution from Dabinett’s, which adds weight in the middle of the palate; Chisel Jersey adds length at the end of it. Producers who work with both tend to treat Dabinett as the base and Chisel Jersey as the correction, and to use the latter in single-figure percentages.
The tree is unremarkable to grow — moderately vigorous, moderately scab-prone, biennial like most of its neighbours — with one real advantage. The hard flesh keeps. Fruit that can sit in store for weeks without breaking down lets a small mill spread its pressing across a longer season, and that is a practical benefit that does not show up in any analysis.
The name is a small case study in how cider apple nomenclature misleads. "Jersey" is a West Country word for a full bittersweet, used across Somerset and Devon for fruit with no connection to each other or to the Channel Islands, and there are at least half a dozen Jerseys in circulation. The persistent claim that Chisel Jersey is the parent of Dabinett has no published support at all and appears to survive simply because the two are the pair of dependable full bittersweets a Somerset grower thinks of together.
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
Attributed to the Martock district of south Somerset. "Jersey" here is the West Country term for a full bittersweet and has nothing to do with the Channel Islands; the "chisel" is usually explained by the fruit’s hard flesh, which is a plausible folk etymology rather than a documented one.
Related cultivars
Recorded relationships, including the ones this fruit is routinely confused with.
Often confused with
Dabinett
Linked by a persistent and unevidenced claim that Chisel Jersey is Dabinett’s parent.
Similar role
Harry Masters’ Jersey
The other Somerset Jersey used for structure, though Harry Masters’ Jersey is softer.
Often confused with
Coat Jersey
One of a group of West Country Jerseys whose names travel better than their identities.
Similar role
Ashton Brown Jersey
Comparable role in a blend: tannin and length rather than volume.
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.
Dabinett
The most widely planted English cider apple: a small, late-ripening bittersweet whose soft, full tannin ferments into a cider that needs almost nothing added to it.
Yarlington Mill
A vigorous Somerset bittersweet, conical and red-striped, giving a cider with more aromatic lift than most of its class and a reputation for fruitiness that the tannin figures do not explain.
Harry Masters’ Jersey
A medium bittersweet from the Yarlington district, valued for tannin that is full without being harsh, and among the more reliable croppers in a class that is generally unreliable.
Ashton Brown Jersey
A late, full bittersweet selected at Long Ashton from Somerset material, giving high tannin and a long finish from a tree that crops poorly.
Nehou
A Norman bittersweet long grown in English orchards, giving high tannin from a small, late, hard fruit and cropping better than most of its class.
Black Vallis
A dark-skinned Somerset bittersweet from the Frome district, giving firm tannin from a heavy-cropping tree.
Styles it is characteristic of
West Country farmhouse cider
Cider made on the farm from tannic bittersweet fruit, wild-fermented in wood and sold still and unfiltered, in a tradition whose variability is one of its defining features.
Somerset cider
Cider from the Somerset levels and the surrounding hills, built on a locally selected bittersweet fruit population and a tradition of full-bodied, tannic, still cider.
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 dabinett — The most widely planted English cider apple: a late bittersweet with soft, full tannin that ferments into a cider needing very little added to it. Long Ashton measured it at 0.18 per cent acid and 0.29 per cent tannin.
- How do you blend cider
- How long can apples be kept before pressing
- Should i ferment cider in an oak barrel — A sound, full barrel is a fine maturation vessel; a leaky, half-empty or previously spoiled one is the fastest route to vinegar. Wood cannot be sterilised, so a barrel carries whatever lived in it before.
- What is a traditional west country cider blend — Predominantly bittersweet fruit for body and tannin, with a proportion of sharp fruit for acidity and sometimes a smaller share of bittersharps for both. The exact composition varied by farm and by what was in the orchard.
- What is somerset cider
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.
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.
A Somerset Pomona: The Cider Apples of Somerset
Liz Copas, The Dovecote Press, 2001. ISBN 9781874336877 · reference work · bibliographic record verified, not opened 2026-08-25
Bibliographic record verified on 2026-08-25 against Open Library: Liz Copas, The Dovecote Press, 2001, ISBN 9781874336877. The author was Long Ashton’s cider pomologist, which is why this work is registered for Somerset cultivar identity at all — it is the nearest thing to a successor to the station’s own descriptions. No copy was opened. Not digitised in any open collection.
University of Reading / Defra, Brogdale · research institute · retrieved 2026-08-24
The UK national reference collection for apple and pear cultivars. The authority CiderHQ uses for whether two names are the same fruit, which is the central duplicate-resolution problem in cider data.
Traditional record Evidence standard for this record. What that means.