Friuli-Venezia Giulia: Collio Goriziano / Collio DOC

In 238 AD Herodian, a Greek historian of the Roman imperial age, wrote of vines trained on apple, pear and fig trees here, and of the territory's wine vessels being lashed together to bridge the Isonzo for the emperor Maximinus Thrax. Notarial deeds of the 14th and 15th centuries record gifts and sales of vineyards, and wine names begin to appear in the 1600s, among them Ribolla and Cividino for whites and, in later centuries, Refosco and Corvino for reds. Modern viticulture dates from the second half of the 1800s, when Count Teodoro Latour brought in French and German varieties in place of lesser local ones. Theodor de La Tour en Voivre, a noble of French origin, is credited with introducing Chardonnay, Sauvignon, Merlot, Cabernet, Pinot and Riesling Renano. Chronicles of the early 1900s put Collio wine at about 90% white. After the Second World War a state border split the territory into Italian Collio and Slovenian Brda. The Consorzio Collio was founded in 1964, with Count Sigismondo Douglas Attems Petzenstein as its president from 1965 to 1999, and the DOC was recognised by presidential decree (DPR) on 24 May 1968. In the mid-1990s Stanko Radikon and Josko Gravner, two established Oslavia producers, went looking for a back-to-basics approach that led to long skin contact for white grapes, and the orange wine revival began in Oslavia.

• 238 AD: the Greek historian Herodian writes of vines and wine vessels in the territory
• 1600s: wine names such as Ribolla and Cividino appear in records; second half of the 1800s: Count Teodoro Latour introduces French and German varieties
• 1916 to 1917: the Isonzo battles razed Oslavia, terraced vineyards included; the oldest vineyard in Oslavia dates from 1922
• 1964: the Consorzio Collio is founded; 24 May 1968: the DOC is recognised by DPR
• 1995: Radikon begins macerating Ribolla on the skins; 2001: Gravner switches entirely to qvevri

Collio occupies the northern hill belt of the province of Gorizia, between the Isonzo river to the east and the Judrio to the west, with the state border with Slovenia to the north and the Isonzo plain to the south; in all there are about 1,500 hectares of specialised vineyard. Viticulture is practised only on hill ground, at average altitudes of 60 to 270 metres. The soils are flysch in four facies: mainly marly, mainly sandstone, a mix of the two, and conglomerate. The rocks are Eocene and Paleocene in origin, raised to the surface from the seabed, and marine fossils are often found in the vineyards. This marl and sandstone flysch is known as ponca, and the soils are usually well drained. The Julian Prealps to the north shelter the hills from cold northern winds, while the Adriatic coast, about 20 kilometres away on average, helps temper temperature swings, giving a mild, temperate microclimate. Summers are warm but not sultry and winters cold and fairly rainy, with average summer temperatures of 21.5 to 22.5°C, winter averages of about 4°C, and annual rainfall of about 1,350 to 1,400 mm.

• Boundaries: Isonzo to the east, Judrio to the west, the Slovenian border to the north and the Isonzo plain to the south; about 1,500 hectares of specialised vineyard
• Hill sites only: valley-floor and plain vineyards are excluded, except level ground created by hillside terracing works and foothill plots above 85 metres in the first production zone
• Ponca: flysch of marl and sandstone; rooting depth to the rock is usually 50 to 100 cm and sometimes 150 cm
• Climate: the Julian Prealps block cold north winds; the Adriatic, about 20 km away on average, moderates temperature swings; rainfall peaks in October and November

White grapes are the protagonists of Collio. Approximate shares of total production, as listed in September 2026: Pinot Grigio almost 30%, Sauvignon about 20%, Friulano about 15%, Ribolla Gialla about 10%, Chardonnay about 8%, Pinot Bianco 4%, Malvasia about 3% and Traminer Aromatico 1%; among the reds, Cabernet Franc 4% and Pinot Nero 1%. Friulano, an autochthonous wine made from Tocai Friulano grapes, has an almond aroma and a subtle bitterish aftertaste. Ribolla Gialla is typically dry and fresh, with pronounced acidity, and its colour can turn amber when macerated for long periods, as is typical in the Oslavia area. Collio Bianco is the zone's white blend, while Collio Rosso is made only in a very small percentage. Collio whites are made by soft pressing and temperature-controlled fermentation without the skins, but wines meant for long maturation before release are vinified with skin contact, giving deeper golden tones and more body. Picolit, made in very small quantities, is a sweet wine.

• Largest shares (as listed in September 2026): Pinot Grigio almost 30%, Sauvignon about 20%, Friulano about 15%, Ribolla Gialla about 10%
• Friulano (from Tocai Friulano): almond aroma and a subtle bitterish aftertaste; the palate is dry, warm, full, bitterish and harmonious
• Ribolla Gialla: dry and fresh, with pronounced acidity; long maceration can give an amber colour, a practice typical of Oslavia
• Reds are a minority: Cabernet Franc 4% and Pinot Nero 1% of production; Collio reds are typically bright ruby with a fine herbaceous note

Oslavia, a hamlet of Gorizia, is known for Ribolla Gialla and for the natural revolution of orange wines, and Decanter's travel guide names Radikon, Gravner and Dario Princic as seminal producers there. Stanko Radikon made his first bottling from the 1979 vintage; in 1995 he began macerating Ribolla on the skins, and from 2002 all the estate's wines were macerated for three months without added sulphites. Stanko Radikon (d. 2016) launched the shorter-maceration S line in 2009 with his son Saša, winemaker at the family estate. Josko Gravner, also in Oslavia, visited Georgia in 2000 and switched entirely to qvevri in 2001; his cellar holds amphorae from the Caucasus, his vineyard plantings include Ribolla and Pignolo, and the estate covers 32 hectares, 15 of them currently under vine. Venica & Venica is in Dolegna del Collio, the northernmost comune of the DOC, and farms about 40 hectares of vines; Jermann is based at Trussio in Ruttars, also in Dolegna del Collio; and Decanter points to Nicola Manferrari's Borgo del Tiglio for refined varietal Friulano and Malvasia Istriana.

• Radikon (Oslavia): first bottling of the 1979 vintage; Ribolla on the skins from 1995; all wines macerated for three months without added sulphites from 2002; S line with shorter macerations from 2009
• Gravner (Oslavia): visited Georgia in 2000 and all-qvevri from 2001; amphorae from the Caucasus and 15 of 32 hectares under vine
• Venica & Venica (Dolegna del Collio): founded in 1930 by grandfather Daniele; about 40 hectares, about 85% white; Ronco delle Cime Friulano and Ronco delle Mele Sauvignon are its two cru wines
• Jermann (Trussio, Ruttars, Dolegna del Collio) makes Vintage Tunina; Decanter cites Borgo del Tiglio (Nicola Manferrari) for pure, varietal wines

The DOC 'Collio Goriziano' or 'Collio' was approved by DPR of 24 May 1968 (Gazzetta Ufficiale no. 178, 15 July 1968), and the published text carries amendments up to DM of 30 November 2011. Article 1 lists 19 types: Bianco, Chardonnay, Malvasia (from Malvasia Istriana), Müller Thurgau, Picolit, Pinot Bianco, Pinot Grigio, Ribolla or Ribolla Gialla, Riesling (from Riesling Renano), Riesling Italico, Sauvignon, Friulano (from Tocai Friulano), Traminer Aromatico, Rosso, Cabernet, Cabernet Franc, Cabernet Sauvignon, Merlot and Pinot Nero. A varietal wine needs at least 85% of the named variety, with up to 15% of other listed varieties of the same colour. Bianco and Rosso may be made from one or more listed varieties of the matching colour, but the aromatic Müller Thurgau and Traminer Aromatico may not exceed 15% of the total, and Cabernet may come from Cabernet Franc, Cabernet Sauvignon and/or Carmenere. Vineyards must be on hill sites; plantings made after the rules took effect need at least 4,000 vines per hectare; maximum yields are 11 tonnes per hectare, or 4 tonnes for Picolit. The vintage must appear on the label. Riserva requires 30 months of ageing for reds, including at least six months in wood, and 20 months for whites. Valoritalia is the control body authorised by the agriculture ministry to check compliance each year.

• Approved by DPR of 24 May 1968; amendments up to DM of 30 November 2011
• 19 types (13 white, 6 red); all may carry Riserva: 30 months for reds, at least six of them in wood, and 20 months for whites
• Varietal wines: at least 85% of the named grape; in Bianco and Rosso, the aromatic Müller Thurgau and Traminer Aromatico are capped at 15%
• Hill vineyards only; at least 4,000 vines per hectare for newer plantings; maximum yield 11 t/ha (Picolit 4 t/ha); vintage compulsory on the label

The Consorzio Tutela Vini Collio is based at Via Gramsci 2 in Cormons. Localities across the hills include Capriva del Friuli, Cormòns, Dolegna del Collio, Farra d'Isonzo, Lucinico, Mossa, Oslavia and San Floriano del Collio. Udine, Cormons and Gorizia make attractive bases for a wine trip; many wineries are family estates, and most are happy to receive a small number of guests when visits are arranged in advance. The local cuisine draws on Friulian, Slovenian and Austrian elements, walkers and cyclists have about 90 km of routes under the Slow Collio project, and events include Cantine Aperte on the last weekend of May and Cantine Aperte a San Martino in November. Collio's first tourist route, the Strada del Vino e delle Ciliegie, dates from 1963. Across the border, which has not physically existed since 2007, lies Slovenia's Brda, Collio's Slovenian twin.

• Bases: Cormons, home of the Consorzio at Via Gramsci 2, plus Udine and Gorizia
• Book ahead: most family estates welcome a small number of guests when visits are arranged in advance
• Events: Cantine Aperte (last weekend of May) and Cantine Aperte a San Martino (November)
• Slow Collio: about 90 km of routes, 25 km on cycle paths and 65 km on paved roads; Brda, Collio's Slovenian twin, lies just across the border

Primary sources (Consorzio Tutela Vini Collio pages carrying the DOC disciplinare, and producers' own sites for their own facts): https://www.collio.it/en/i-valori-del-collio/, https://www.collio.it/en/vini/white/, https://www.collio.it/en/vini/red/, https://www.collio.it/territorio-collio/, https://www.radikon.it/en/history/, https://www.radikon.it/en/vini/, https://www.gravner.it/, https://venica.it/vini/, https://www.jermann.it/_it/vini. Secondary: https://www.decanter.com/features/orange-wines-it-s-time-to-get-in-touch-245524/, https://www.decanter.com/wine-travel/italy/decanter-travel-guide-friuli-italy-2-291879/. Last verified 2026-10-05