Barley Varieties and Why They Matter

A mealy grain rather than a steely one: for distillers, that difference is part of barley’s appeal. They need grain that malts reliably, processes consistently and delivers a good alcohol yield. The flavour question is less settled. Irish research found that variety influenced new make spirit alongside growing environment and season, rather than acting alone.[4][12]

That distinction runs through the choice of barley: dependable performance through processing on one side, and a contribution to flavour that needs to be understood in its growing context on the other.

What distillers want from barley varieties

Good distilling barley must perform from the first soak to the still. The Scotch Whisky Association (SWA) identifies variety, germination, nitrogen content and grain size as key characteristics, favouring varieties that deliver high alcohol yield without undesirable by-products during distillation.[4]

Its priorities are practical: high starch content, vigorous germination, rapid and even water uptake, and resistance to splitting. It also wants a mealy rather than steely endosperm, the interior of the grain. These qualities concern how barley behaves through processing, not simply how well it grows.[4]

That explains the separate approval route for malt distilling. Barley suitable for brewing is not automatically approved for distilling, although some varieties earn approval for both.[1]

For the wider ingredient picture, start with the three ingredients of Scotch malt whisky. Here, three threads matter: a variety’s processing credentials, its growing history and the evidence for its contribution to flavour.

Nitrogen: the right level for the job

Pot still malt and grain distilling malt need different nitrogen levels. The SWA specifies below 1.60% for pot still malt; the Maltsters’ Association of Great Britain (MAGB) describes about 1.5% as optimum, with acceptance up to 1.65%. These are different published specifications, rather than a single universal threshold.[3][4]

For grain distilling malt, the SWA prioritises high enzyme levels and says barley nitrogen will normally exceed 1.80%. Always read a nitrogen figure alongside its intended use: the grain distilling specification is not the target for pot still malt.[4]

Another selection criterion is glycosidic nitrile potential. The SWA explains that epiheterodendrin, or EPH, acts as a precursor to ethyl carbamate during whisky production, and supports EPH non-producing varieties. For grain distilling malt, it says only varieties designated as non-producers are selected.[4]

How varieties earn approval

Approval takes years of testing, followed by trials at commercial scale. Provisional approval requires three crop years of successful micromalting data. Full approval follows successful commercial-scale malting, brewing and/or distilling trials.[2]

The MAGB’s Malting Barley Committee (MBC) system has worked alongside the AHDB Recommended Lists trials for around 50 years, according to the association’s account published by AHDB in 2024. The process separates promising trial results from demonstrated commercial performance, though approval does not mean immediate acceptance by every malting, brewing or distilling company.[1][2]

Consistency matters within each delivery, too. MAGB says UK maltsters reject mixed-variety loads, with doubtful loads potentially held for electrophoresis testing. A variety’s identity is part of accepting the grain, long before it becomes information for a whisky label.[3]

The approved list for harvest 2027

Belter and SY Arrow gained Full Approval for Malt Distilling at the UK Malting Barley Committee’s spring 2026 meeting. The list issued after that meeting gives these approvals for harvest 2027.[1]

Laureate, LG Diablo, SY Tennyson and Belter hold Full Approval for both brewing and malt distilling. The list records approval, not a ranking of flavour or acceptance by every distiller.[1]

Its changing membership tells a story. In 2014, Farmers Weekly described Concerto as the only spring variety on the then HGCA Recommended List approved for both brewing and distilling. Concerto does not appear on the harvest 2027 MBC list.[1][11]

Local experience also shapes a producer’s choice. Kilchoman reported sowing Concerto on Islay in 2018 after trialling Laureate the previous year. The distillery described Concerto as a variety it knew from experience performed well there.[10]

Heritage barley and organic certification

An ancient island landrace, a gamma-ray mutant and a Victorian revival: older barleys have very different histories. Bere is an ancient six-row landrace; Golden Promise originated as a gamma-ray mutant of Maythorpe; Chevallier is a Victorian variety revived from stored seed. None of those histories makes a barley organic, which is a separate matter of certification.[5][7][9]

Bere: island strengths, distillery trade-offs

Bere can crop within a short season and tolerate sandy, high-pH soils deficient in manganese. Still grown on several Scottish islands, it also has drawbacks: low grain yield and long straw prone to lodging, as a 2023 scholarly review records.[7]

The distillery trade-offs are just as concrete. Bere malt gives a lower alcohol yield, and mash volumes need reducing because of their density. Age and heritage do not necessarily mean more whisky from the same quantity of malt.[7]

Yet its revival is measurable. The review records about 9 hectares on Orkney in 2002, rising to about 73 hectares by 2020. By then, approximately 200 tonnes of Orkney Bere annually went into malt whisky.[7]

Golden Promise: an older variety with a different origin

Golden Promise is a two-row spring barley identified after gamma-ray treatment of Maythorpe. A 2020 genome paper records its extensive use in malting and whisky production, particularly in Scotland during the 1970s and early 1980s.[5]

Its historical importance should not be mistaken for current dominance. Golden Promise is absent from the harvest 2027 MBC malt distilling list, while the genome paper’s statement that some distilleries still used it belongs to its 2020 publication context.[1][5]

Story box: Chevallier returns from stored seed

A Victorian barley returns from the seed bank

The John Innes Centre revived Chevallier from seed held in its Germplasm Resources Unit.9 In 2012, it grew about 0.2 hectares (half an acre), which Crisp floor malted at Great Ryburgh, Norfolk.9 The centre’s account documents a barley revival and brewing project, not a whisky release.9

The John Innes Centre’s account, published 12 April 2013, supports the seed-bank origin, growing area, year and malting location.

Last checked: 7 November 2026.

Verdict badge

• Claim: Chevallier was regrown in 2012 and floor malted in Norfolk.
• Verdict: Documented.
• What the record shows: The John Innes Centre records its revival project and identifies the maltster.
• Evidence against or gap: A whisky release is not established by this source.
• Earliest known source: John Innes Centre, 12 April 2013.
• Sources: John Innes Centre, 12 April 2013: https://jic.ac.uk/news/beer-brewed-from-victorian-barley-variety/.
• Last checked: 7 November 2026.

Organic means certification, not an older variety

Organic status comes from production rules and certification, not a barley’s name. For Great Britain, GOV.UK guidance updated on 20 August 2025 says organic labelling requires compliance with organic production rules, at least 95% organic agricultural ingredients, and certification of the product and its suppliers by an approved organic control body.[14]

Deanston says its whisky was first certified by the Organic Food Federation in 2000. Its account describes dedicated equipment or thorough cleaning for organic batches: choosing organic barley is only part of organic production.[15]

What the flavour evidence actually shows

Variety, growing environment and their interactions influenced the sensory attributes of laboratory new make spirit in the Irish study. That is the central finding, and its limit matters just as much: the research did not test mature bottled whisky or isolate variety from growing conditions.[12]

Published in 2021, the peer-reviewed study compared Olympus and Laureate grown at Athy, County Kildare, and Bunclody, County Wexford, in 2017 and 2018. Researchers detected 42 volatile compounds in the laboratory new make, with sensory influences from variety, environment and their interactions across both seasons.[12]

The authors, who included staff from Waterford Distillery and Boortmalt, described the results as demonstrating a terroir impact. Their evidence covered two varieties, two locations and two seasons: a specific study of barley and new make, rather than mature bottled whiskies.[12]

Verdict badge

• Claim: Barley variety itself contributes a distinctive flavour to whisky.
• Verdict: Disputed.
• What the record shows: The Bere review reports distillers’ view that Bere contributes a unique flavour. The Irish study found that variety, environment and their interactions influenced new make sensory attributes.[7][12]
• Evidence against or gap: The Irish study did not test mature bottled whisky, and its findings do not isolate variety from growing conditions.
• Earliest known source: Not established from the supplied sources.
• Sources: Bere review, 2023: https://eprints.whiterose.ac.uk/203268/1/Plants%20People%20Planet%20-%202023%20-%20Martin.pdf. Irish study, 2021: https://www.ebi.ac.uk/europepmc/webservices/rest/search?query=DOI:10.3390/foods10020443&resultType=core&format=json.
• Last checked: November 2026.

For the next ingredient question, see yeast and its effect on flavour. Keeping the evidence for each ingredient separate makes it easier to understand what a barley claim establishes.

Where to go next

• The Three Ingredients of Scotch Malt Whisky: place barley within the wider ingredient picture.
• Corn, Rye and Wheat in Whisky: compare the other principal whisky grains.
• Water in Whisky Making: Does the Source Matter?: examine another ingredient’s contribution.
• Yeast and Its Effect on Flavour: explore the fermentation ingredient.

Sources

[1] The Maltsters’ Association of Great Britain, Malting Barley Committee. Update to MBC Approved List, Harvest 2027. Spring 2026 meeting, published May 2026.
https://www.ukmalt.com/wp-content/uploads/2026/05/MBC-Press-Release-May-2026.pdf

[2] AHDB. Almost 200 years of malting barley success. The MAGB’s account, 25 March 2024.
https://ahdb.org.uk/news/almost-200-years-of-malting-barley-success

[3] The Maltsters’ Association of Great Britain. Barley Requirements. Undated web guidance.
https://www.ukmalt.com/uk-malting-industry/barley-requirements/

[4] Scotch Whisky Association. Scotch Whisky Cereals Technical Note. Sixth edition, August 2021.
https://www.scotch-whisky.org.uk/media/1900/cereals-technical-note-6th-edition-240821.pdf

[5] Schreiber, M. et al. A Genome Assembly of the Barley ‘Transformation Reference’ Cultivar Golden Promise. G3: Genes, Genomes, Genetics, 10(6), 1823 to 1827, 2020.
https://pmc.ncbi.nlm.nih.gov/articles/PMC7263683/

[7] Martin, P. et al. Back to the future: Using ancient Bere barley landraces for a sustainable future. Plants, People, Planet, 2023.
https://eprints.whiterose.ac.uk/203268/1/Plants%20People%20Planet%20-%202023%20-%20Martin.pdf

[9] John Innes Centre. Beer brewed from Victorian barley variety. 12 April 2013.
https://jic.ac.uk/news/beer-brewed-from-victorian-barley-variety/

[10] Kilchoman Distillery. Islay’s only Single Variety, Single Farm Scotch Whisky. Producer’s account, 26 September 2018.
https://www.kilchomandistillery.com/distillery-news/islays-only-single-variety-single-farm-scotch-whisky

[11] Jones, D. The English growers filling Scotch whisky stills. Farmers Weekly, 28 February 2014.
https://fwi.co.uk/arable/the-english-growers-filling-scotch-whisky-stills

[12] Kyraleou, M. et al. The Impact of Terroir on the Flavour of Single Malt Whisk(e)y New Make Spirit. Foods, 10(2), 443, 2021. Abstract and affiliations supplied through the Europe PMC record.
https://www.ebi.ac.uk/europepmc/webservices/rest/search?query=DOI:10.3390/foods10020443&resultType=core&format=json

[14] Department for Environment, Food & Rural Affairs. Organic food: labelling and advertising rules. Updated 20 August 2025.
https://www.gov.uk/guidance/organic-food-labelling-rules

[15] Deanston Distillery. The Path to Organic Whisky: What Distilleries Need to Do. Producer’s account, 30 August 2024.
https://deanstonmalt.com/en-us/blogs/news/the-path-to-organic-whisky

This article is desk research based on the supplied verified fact sheet, distinguishing industry specifications, research findings, government guidance and producers’ own accounts.

Last checked: November 2026.