What is made here
Wine colours
Colours the rules allow. Pick a colour to filter the rules and grapes below.
Where it is
Terre Alfieri in Italy
- Latitude
- 44.7°–44.9° N
- Vineyard altitude
- 171 m to 259 m
- Production zone
- 15,257 ha
Lies within
Piemonte
Worked out from the boundaries (smallest container first). They follow whole communes, so a neighbour sharing a commune can show up here too.
Boundary drawn from whole communes, so it is a little larger than the legal zone. Boundary: Eurac Research PDO inventory (CC0). Country outlines: Natural Earth. Dots on the zone map are the vineyard points used for climate.
Showing every colour The colour filter changes the rules and grapes. Climate, vintages and soils describe the vineyards, so they stay the same.
01 · What the law says
The rules
Limits on grapes, yields, ripeness and ageing that every wine labelled Terre Alfieri must meet.
Blend rules
Terre Alfieri Arneis
- 85–100% Arneis · Main grape
- ≤ 15% other non-aromatic white grapes authorised in Piedmont · Others allowed
Blend rules
Terre Alfieri Arneis Superiore
- 85–100% Arneis · Main grape
- ≤ 15% other non-aromatic white grapes authorised in Piedmont · Others allowed
At least 6 months' ageing.
Blend rules
Terre Alfieri Nebbiolo
- 85–100% Nebbiolo · Main grape
- ≤ 15% other non-aromatic black grapes authorised in Piedmont · Others allowed
At least 4 months' ageing.
Blend rules
Terre Alfieri Nebbiolo Superiore
- 85–100% Nebbiolo · Main grape
- ≤ 15% other non-aromatic black grapes authorised in Piedmont · Others allowed
At least 12 months' ageing.
Blend rules
Terre Alfieri Nebbiolo Riserva
- 85–100% Nebbiolo · Main grape
- ≤ 15% other non-aromatic black grapes authorised in Piedmont · Others allowed
At least 24 months' ageing.
Other varieties allowed
Besides the main grapes, the rules allow these varieties in some wines. Grape names link where a profile exists.
19 varieties · Terre Alfieri Arneis, Terre Alfieri Arneis Superiore
Baratuciat, Barbera Bianca, Bussanello, Cortese, Erbaluce, Favorita, Malvasia Moscata, Manzoni Bianco, Muller Thurgau, Muscat Blanc A Petits Grains, Nascetta, Pinot Blanc, Riesling, Rossese Bianco, Sauvignon Blanc, Sylvaner, Timorasso, Viognier, Welschriesling
47 varieties · Terre Alfieri Nebbiolo, Terre Alfieri Nebbiolo Superiore, Terre Alfieri Nebbiolo Riserva
Albarossa, Ancellotta, Avana', Avarengo, Barbera, Becuet, Bonarda, Brachetto, Bragat Rosa, Cabernet Franc, Cabernet Sauvignon, Chatus, Ciliegiolo, Cornarea, Croatina, Dolcetto, Doux d'Henry, Durasa, Freisa, Gamay, Gamba Rossa, Grignolino, Lambrusca di Alessandria, Malvasia Nera Lunga, Malvasia di Casorzo, Malvasia di Schierano, Merlot, Montanera, Moscato Nero di Acqui, Ner d'Ala, Neretta Cuneese, Neretto di Bairo, Passau, Pelaverga, Pelaverga Piccolo, Petit Verdot, Pinot Noir, Plassa, Quagliano, Ruche', Sangiovese, Slarina, Syrah, Teroldego, Uva Rara, Uvalino, Vespolina
In the vineyard and cellar: rules for every wine
4,000
Vines per hectare, minimum
130–350 m
Vineyard altitude allowed
Training
Systems allowed
controspalliera bassa (Guyot tradizionale)
No forcing
Forcing the vines is prohibited
Cellar
Where the wine must be made
Within the production zone
Allowed
Enrichment (chaptalisation)
02 · Climate fingerprint
The climate
The growing season averages 18.5 °C, warm on Gregory Jones's scale, with 1,812 growing degree days (Winkler III).
The average year 1991–2020, vineyards at about 237 m
Monthly mean, °CRain, mmGrowing season
- Growing-season temperature
- 18.5 °C
- Warm · 17–19 °C (Jones)
- Growing degree days
- 1,812
- Region III: 1,667–1,943 degree days
- Growing-season rain
- 570 mm
- Of 936 mm a year
- Harvest rain
- 185 mm
- September–October
Copernicus ERA5-Land monthly averages at 5 vineyard points (Vineyard point 1, 226 m; Vineyard point 2, 268 m; Vineyard point 3, 265 m; Vineyard point 4, 182 m; Vineyard point 5, 245 m), moved to each point's height from the model's terrain. Indices that need daily data are not captured yet. How the climate figures are made.
Closest climates in the database
Picked by the data, not by hand: the profiles nearest on season warmth (counted twice), degree days, rain, ripening-month nights and day–night range. Neighbours within 30 km are left out, as they share the same weather.
1. GalluccioVery similarCompared with Terre Alfieri: same season warmth, similar rain.
2. Saint-ChinianVery similarCompared with Terre Alfieri: same season warmth, similar rain.
3. PominoVery similarCompared with Terre Alfieri: same season warmth, similar rain.
Growing-season temperature
Growing degree days
Growing-season rain
03 · Year by year
35 vintages
Each column is one growing season: heat above or below the 1991–2020 average, and rain at harvest. Pick a year for the details.
Warmer than averageCooler than averageHarvest rain (Sep–Oct)Average harvest rain, 185 mm
2025
- Growing-season temp.
- Growing degree days
- Harvest rain
- Growing-season rain
- September nights
- Hot days and frosts
Seasons are labelled by harvest year (April–October). Year-to-year changes from ERA5-Land; tested against station records in Alto Adige (r = 0.94 for season temperature at Bolzano). Rain varies more locally, so treat single-season rain with some caution. Vintage ratings, harvest dates and frost or hail events have places in the data model but are not loaded yet.
04 · Where the numbers come from
Sources
- A geospatial inventory of regulatory information for wine protected designations of origin in Europe · Candiago et al., Scientific Data 9, 394 (2022); Eurac Research · CC0
- Quality wines in Italy and France: a dataset of PDO specifications · figshare 25393261 · CC BY 4.0
- ERA5-Land monthly averaged data (reanalysis-era5-land-monthly-means) · Copernicus Climate Change Service (C3S), Climate Data Store · CC BY 4.0 (Copernicus licence)
- OpenStreetMap vineyard areas (landuse=vineyard), from Geofabrik country extracts · OpenStreetMap contributors · ODbL 1.0
- Copernicus DEM GLO-90 (AWS open data tiles) · European Space Agency / Copernicus · Copernicus DEM licence
- Disciplinare di produzione: Terre Alfieri (version published by MASAF up to May 2023, via the Internet Archive; later amendments not yet included) · Ministero dell'agricoltura, della sovranità alimentare e delle foreste (MASAF) · Official act
- Appellation nesting worked out from boundaries (pipeline/build_nesting.py) · Vinous, from the Eurac PDO boundaries · CC0 (source data)
- Climate profiles calculated by Vinous: method
Still to check (3)
- Generated from EU reference data: check against the current product specification.
- From the specification: A DOCG. Vinification and bottling may also take place anywhere in the provinces of Asti and Cuneo. Wines with the 'vigna' mention have lower yields (max_yield_t_ha_uga), higher natural alcohol minima (12-13.5%), may not be enriched, and the vigna Arneis and Nebbiolo need 17 and 23 g/l extract; young vineyards have further reduced yields from the third to the seventh year.
- National tier (DOC/DOCG) not captured yet; rules extracted from the specification text.