Cider apple
Liberty
A scab-immune Geneva release of 1978 carrying resistance bred in from a wild crab, widely planted by organic and low-spray growers and used as a McIntosh-style aromatic component in cider.
Also written Liberty.
- Classification
- Not classified under any recorded system
- Harvest
- Mid (Late September to mid October)
- Single varietal
- Sometimes bottled on its own
- Blend role
- Acid lift, Aroma
- Origin
- New York State Agricultural Experiment Station, Geneva, New York
- Species
- Malus domestica
- Vigour
- Moderate
- Biennial bearing
- Slightly biennial
- Keeping
- Good
How it is classified
No classification scheme has been recorded for Liberty. That is common outside Europe: the English, French and Spanish systems were each built for their own fruit, and a cultivar grown where none of them applies simply has no class. What the fruit contributes to a blend is described below regardless — the class is a shorthand for that, not a substitute.
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 | High | |
| Tannin | Negligible | |
| Sugar | Moderate | |
| Bitterness | None | |
| Astringency | None | |
| Aroma | Pronounced | |
| Body | Medium |
Cornell acid figures from the releasing station, with the aromatic axis set from the cultivar’s consistent description as McIntosh-like.
Bright and aromatic in the McIntosh family, with firmer flesh and a sharper, longer-lasting acidity.
Aroma
Descriptors associated with this fruit. Each names a character with a known cause, and association is not a promise — what reaches the glass depends on the ferment as much as on the apple.
- Fresh-cut apple — The smell of a cut apple surface, produced within seconds of the fruit tissue being broken by six-carbon aldehydes released from membrane fats.
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 (63–71) | USDA-ARS Plant Genetic Resources Unit, Geneva, New York, USA | 2017Modern analysis | Cornell University / USDA-ARS Plant Genetic Resources Unit |
| Fruit firmness | 66.8 N (56.7–77.0) | USDA-ARS Plant Genetic Resources Unit, Geneva, New York, USA | 2017Modern analysis | Cornell University / USDA-ARS Plant Genetic Resources Unit |
| Fruit weight | 142 g (119–165) | USDA-ARS Plant Genetic Resources Unit, Geneva, New York, USA | 2017Modern analysis | Cornell University / USDA-ARS Plant Genetic Resources Unit |
| Starch pattern index | 7.4 SPI (6.9–7.9) | USDA-ARS Plant Genetic Resources Unit, Geneva, New York, USA | 2017Modern analysis | Cornell University / USDA-ARS Plant Genetic Resources Unit |
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 |
|---|---|---|---|---|
| Brix | 10.6 °Bx (8.5–12.7) | USDA-ARS Plant Genetic Resources Unit, Geneva, New York, USA | 2017Modern analysis | Cornell University / USDA-ARS Plant Genetic Resources Unit |
| Fructose | 59.5 g/L (20.0–99.0) | USDA-ARS Plant Genetic Resources Unit, Geneva, New York, USA | 2017Modern analysis | Cornell University / USDA-ARS Plant Genetic Resources Unit |
| Glucose | 14.2 g/L (9.1–19.3) | USDA-ARS Plant Genetic Resources Unit, Geneva, New York, USA | 2017Modern analysis | Cornell University / USDA-ARS Plant Genetic Resources Unit |
| pH | 3.44 pH | USDA-ARS Plant Genetic Resources Unit, Geneva, New York, USA | 2017Modern analysis | Cornell University / USDA-ARS Plant Genetic Resources Unit |
| Sorbitol | 6.6 g/L (4.9–8.3) | USDA-ARS Plant Genetic Resources Unit, Geneva, New York, USA | 2017Modern analysis | Cornell University / USDA-ARS Plant Genetic Resources Unit |
| Sucrose | 41.6 g/L (26.6–56.6) | USDA-ARS Plant Genetic Resources Unit, Geneva, New York, USA | 2017Modern analysis | Cornell University / USDA-ARS Plant Genetic Resources Unit |
| Titratable acidity | 5.4 g/L (2.2–8.6) | USDA-ARS Plant Genetic Resources Unit, Geneva, New York, USA | 2017Modern analysis | Cornell University / USDA-ARS Plant Genetic Resources Unit |
| Total acid | 0.600–0.900 % w/v | Geneva, New York State | 2010sModern analysis | Cornell University, School of Integrative Plant Science |
| Total phenolics | 560.0 mg/L | USDA-ARS Plant Genetic Resources Unit, Geneva, New York, USA | 2017Modern analysis | Cornell University / USDA-ARS Plant Genetic Resources Unit |
How these were measured
- Mean of the fruit sampled per accession; where a bracket is shown it is one standard deviation either side of the mean, not the observed range. Published to two decimal places and shown at the precision CiderHQ displays for the unit.
- Mean of the fruit sampled per accession; where a bracket is shown it is one standard deviation either side of the mean, not the observed range.
- Cornell generic starch–iodine chart, 1–8, where 1 is no hydrolysis and 8 is complete. Mean of replicate fruit; a bracket, where shown, is one standard deviation either side of it.
- Penetrometer, mean of replicate fruit; a bracket, where shown, is one standard deviation either side of the mean.
- Refractometer on pressed juice. Mean of replicates; a bracket, where shown, is one standard deviation either side of the mean.
- Titration to pH 8.2 with sodium hydroxide, reported as malic acid equivalents. Mean of replicates; a bracket, where shown, is one standard deviation either side of the mean.
- Meter on pressed juice before fermentation. Mean of replicates; a bracket, where shown, is one standard deviation either side of the mean.
- Löwenthal permanganate titration, reported by the source as grams per litre of tannic acid equivalent and stored here as milligrams per litre by exact conversion so that it sits in one column with the Folin–Ciocalteu figures the site also holds. The two methods do not measure the same thing and are not interchangeable.
- Enzymatic assay (Megazyme). Mean of replicates; a bracket, where shown, is one standard deviation either side of the mean.
- D-sorbitol/xylitol assay kit (Megazyme), sorbitol dehydrogenase method. Mean of replicates; a bracket, where shown, is one standard deviation either side of the mean.
- Reported as malic acid from the station that released the cultivar. Liberty is a firm sharp and loses acid more slowly than McIntosh.
- A chart position, not a quantity. Almost every accession here scored at or near 8, which says the fruit was picked at or past full starch conversion rather than that the cultivars are alike.
- One harvest at one site. Soluble solids move several degrees between seasons and with crop load.
- The published standard deviation on this reading is too large to describe real variation in the pH of apple juice and is not reproduced; the mean is.
- A permanganate figure and a Folin–Ciocalteu figure for the same juice can differ by a factor of two. Compare this reading with other permanganate readings, not with a Folin one. The published standard deviation on this reading equals or exceeds the mean, so the interval it describes runs below zero. It is not reproduced; the mean is.
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.
USDA-PGRU Malus germplasm characterisation
USDA-ARS Plant Genetic Resources Unit, Geneva, New York, in the Finger Lakes region of western New York State · 2017 · Cornell University / USDA-ARS Plant Genetic Resources Unit
Humid continental, with cold winters and warm summers moderated by the Finger Lakes — a sharper seasonal swing than any of the European cider regions whose fruit the collection holds, and warm enough in late summer to bring acid down faster than a maritime autumn does.
- Held as
- PI 588943, held as “Liberty”
- Published standard deviation on juice pH, published as mean 3.44, standard deviation 4.2. A standard deviation of that size cannot describe real variation in the pH of apple juice. The mean is published; the interval is not.
- Published standard deviation on total phenolics, published as mean 560 mg/L, standard deviation 2200 mg/L. The deviation equals or exceeds the mean, so the interval it describes runs below zero. Something in the replicates for this accession went wrong, and CiderHQ publishes the mean without pretending to know the spread.
One harvest season. Fruit assessed for weight, diameter, starch pattern index on the Cornell 1–8 chart and flesh firmness by penetrometer; juice pressed and measured for soluble solids by refractometer, titratable acidity by titration to pH 8.2 as malic acid, pH by meter, total phenolics by Löwenthal permanganate titration as tannic acid equivalent, and glucose, fructose, sucrose and sorbitol by enzymatic assay.
In the orchard
- Harvest window
- Mid
- Flowering
- Not recorded
- Vigour
- Moderate
- Cropping
- Slightly biennial
- Keeping
- Good
Precocious and very heavy-cropping; it needs thinning or the fruit stays small.
Disease and pest susceptibility
| Issue | Susceptibility | Note |
|---|---|---|
| Apple scab | low | Carries the Vf gene and is effectively immune to the common races of scab, which is the entire purpose of the cultivar. |
| Fire blight | low | — |
| Cedar apple rust | moderate | — |
Juice and pressing
- Good, persistent acid.
- A bright McIntosh-family aroma at slightly lower intensity.
- Very little tannin.
- Good sugar and good juice yield.
How it is used
- The standard low-spray and organic orchard apple of the northeastern United States and eastern Canada.
- A cider blending component wherever spray programmes are constrained.
On its own
Sometimes bottled on its own
Makes a clean, bright, aromatic cider with good acid and no structure — a firmer, longer-lasting version of a McIntosh cider.
About Liberty
Apple scab is the disease that decides whether an orchard in the humid northeast can be grown without a heavy spray programme, and for most of the twentieth century the answer was no. The co-operative breeding effort between Purdue, Rutgers and Illinois, working with material carrying a resistance gene from the wild crab Malus floribunda, changed that; Liberty is the Geneva release from that line and the one that worked commercially.
For cider it matters twice over. Directly, it gives a bright, McIntosh-like juice with better acid retention than McIntosh itself. Indirectly, and more importantly, it made it possible for small orchards in Vermont, Quebec and upstate New York to grow fruit for pressing without the capital and chemistry of a commercial spray programme, and a great many farm cideries were planted on that basis.
It is a modern cider-programme cultivar in the honest sense: not bred for cider, but bred for a problem that cider growers had, and adopted by them because it solved it. That is the pattern for most of the disease-resistant selections in this file. North American breeding has bred deliberately for scab and blight resistance for eighty years and deliberately for cider chemistry for barely twenty.
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 · documented
A documented institutional release from the co-operative disease-resistance breeding effort of the mid-twentieth century.
Parentage · a recorded cross
Macoun crossed with a Purdue–Rutgers–Illinois selection carrying the Vf scab-resistance gene, which traces to the wild crab Malus floribunda. Neither parent has a CiderHQ record. Recorded as a cross by the breeding programme that made it, which is strong evidence about what was intended and weaker evidence about which pollen took; no genotyping study CiderHQ has read confirms it.
The breeding programme recorded making this cross. Strong evidence about what was intended; weaker evidence about which pollen actually took, which only genotyping settles.
Why it matters
- The most successful product of the mid-century North American disease-resistance breeding effort, and the cultivar that made low-spray orchards practical in the humid northeast.
Related cultivars
Recorded relationships, including the ones this fruit is routinely confused with.
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.
Browns Apple
The standard Devon sharp: a bright red, heavy-cropping, high-acid apple with almost no tannin, and the fruit most English blends reach for when they need lift.
Golden Russet
The highest-gravity fruit in widespread North American cider use — a small bronze russet from New York whose juice regularly presses above 1.060 and which many revival makers treat as their benchmark cultivar.
Hewe’s Crab
The historic cider crab of Virginia — small, hard, very high in acid and unusually tannic for an American apple, and probably a hybrid between a cultivated apple and a native crab.
Kingston Black
The most celebrated English single-varietal cider apple: a small dark-red bittersharp carrying acid and tannin in one fruit, and a tree difficult enough that its reputation has always outrun its plantings.
McIntosh
The defining apple of eastern Canada and northern New England — an Ontario seedling of about 1811 whose perfumed, high-acid juice is the aromatic foundation of most Quebec and northeastern cider.
Wickson Crab
A Californian dessert crab raised by Albert Etter, exceptional for carrying very high sugar and very high acid at the same time, and now one of the most sought-after cider cultivars in North America.
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.
- How do you blend cider
- Is goldrush good for cider — It is one of the modern scab-resistant cultivars American cider makers use for acid and sugar together. A Virginia study measured 15.0 degrees Brix, pH 3.49, 11.1 g/L acid and 359 mg/L polyphenols.
- What apples is quebec cider made from — McIntosh above all. It is to eastern Canada what a bittersweet is to Somerset — the assumed default — and its perfumed, high-acid juice is the aromatic foundation of most Quebec and northeastern cider.
- What does fresh-cut apple mean in a cider tasting note — The smell of a cut apple surface, produced within seconds of the fruit tissue being broken by six-carbon aldehydes released from membrane fats.
- What is modern american cider like
- What is new england cider — A historic American style: strong, dry cider often made with added sugar or raisins and aged, reflecting the colonial practice of fermenting hard and keeping it through the winter.
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.
Cornell Cider Research and Extension programme
Cornell University, School of Integrative Plant Science · university · passage verified 2026-08-24
Runs cultivar trials in New York State and publishes juice chemistry for European cider varieties grown in a North American climate — the single most useful counterweight to treating English figures as universal.
GRIN-Global germplasm database — Malus and Pyrus
United States Department of Agriculture, Agricultural Research Service · research institute · retrieved 2026-08-24
University of Vermont cider research
University of Vermont Extension · university · retrieved 2026-08-24
Research Evidence standard for this record. What that means.