What is made here
Wine colours
The only colour the rules allow.
Where it is
Gros Plant du Pays nantais in France
- Latitude
- 46.8°–47.4° N
- Vineyard altitude
- 12 m to 87 m
- Delimited vineyard land
- 13,077 ha
The delimited vineyard parcels themselves, so the shape is patchy: only land within them may grow the wine. Boundary: INAO parcel delimitation (Licence Ouverte); nearby parcels drawn as one block, with less detail for larger appellations. Country outlines: Natural Earth. Dots on the zone map are the vineyard points used for climate.
01 · What the law says
The rules
Limits on grapes, yields, ripeness and ageing that every wine labelled Gros Plant du Pays nantais must meet.
Blend rules
Gros Plant du Pays Nantais
- ≥ 70% Folle Blanche · Main grape
- ≤ 10% Colombard · Allowed
- – montils · Allowed
Blend rules
Gros Plant du Pays nantais sur lie
- ≥ 70% Folle Blanche · Main grape
- ≤ 10% Colombard · Allowed
- – montils · Allowed
; release from 8 March of the year after the harvest.
Other varieties allowed
Besides the main grapes, the rules allow these varieties in some wines. Grape names link where a profile exists.
2 varieties · Gros Plant du Pays Nantais, Gros Plant du Pays nantais sur lie
Colombard, Montils
In the vineyard and cellar: rules for every wine
5,000
Vines per hectare, minimum
Training
Systems allowed
cordon de Royat; gobelet; éventail; taille Guyot simple
Prohibited
Irrigation
02 · Climate fingerprint
The climate
The growing season averages 16.0 °C, intermediate on Gregory Jones's scale, with 1,296 growing degree days (Winkler Ib).
The average year 1991–2020, vineyards at about 44 m
Monthly mean, °CRain, mmGrowing season
- Growing-season temperature
- 16.0 °C
- Intermediate · 15–17 °C (Jones)
- Growing degree days
- 1,296
- Region Ib: 1,111–1,388 degree days
- Growing-season rain
- 405 mm
- Of 757 mm a year
- Harvest rain
- 132 mm
- September–October
Copernicus ERA5-Land monthly averages at 5 vineyard points (Vineyard point 1, 52 m; Vineyard point 2, 71 m; Vineyard point 3, 14 m; Vineyard point 4, 43 m; Vineyard point 5, 42 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. Coteaux du LayonVery similarCompared with Gros Plant du Pays nantais: same season warmth, similar rain.
2. Anjou-Coteaux de la LoireVery similarCompared with Gros Plant du Pays nantais: same season warmth, similar rain.
3. Rosé d'AnjouVery similarCompared with Gros Plant du Pays nantais: 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, 132 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
- Cahier des charges: Gros Plant du Pays nantais (Cahier des charges de l'appellation d'origine contrôlée Gros Plant du Pays nantais- AGRT2524361A - BO n°50 du 11 décembre 2025) · Ministère de l'Agriculture (Bulletin officiel), as linked by INAO · Official act
- Délimitation parcellaire des AOC viticoles de l'INAO · Institut national de l'origine et de la qualité (INAO), via data.gouv.fr · Licence Ouverte / Open Licence (Etalab)
- Climate profiles calculated by Vinous: method
Still to check (3)
- Generated from EU reference data: check against the current product specification.
- From the specification: The register lists one name; the 'sur lie' mention, governed separately, is added as its own product. 'Sur lie' wines stay on fine lees until bottling, spend no more than one summer in tank or cask, and are bottled in the area between 1 March of the year after the harvest and 30 June of the second year.
- National tier (DOC/DOCG) not captured yet; rules extracted from the specification text.