Own-Rooted / Ungrafted Vines

Own-rooted or ungrafted vines are grapevines growing on their original Vitis vinifera root systems, without being grafted onto a different rootstock. Before the 1860s, this was universal practice. The phylloxera louse (Daktulosphaira vitifoliae), native to eastern North America, was accidentally introduced to Europe in the early 1860s, likely via imported American vine specimens. It was first observed causing vine death near Pujaut in the Gard department of southern France in 1863. Over the next four decades, the pest spread across France, Spain, Italy, Portugal, Germany, and beyond, destroying millions of hectares. The eventual solution was grafting European Vitis vinifera onto resistant American rootstock species (Vitis riparia, Vitis rupestris, Vitis berlandieri), which became standard practice by the early 1900s. Ungrafted vines survived only where natural conditions prevented phylloxera from establishing.

• Before phylloxera, all European vineyards were own-rooted by default
• France alone lost roughly two-thirds of its vineyard area to phylloxera between 1875 and 1900
• Grafting onto American rootstocks became the universal remedy and remains standard practice today

Phylloxera feeds on vine roots by forming galls that disrupt nutrient and water uptake. The louse requires structured soil to create stable tunnels and feeding sites. In deep sandy soils, the loose, shifting particles prevent phylloxera nymphs from establishing, effectively creating a natural barrier. Research indicates soils with less than approximately 3% clay content are hostile to phylloxera survival. Similarly, volcanic soils on islands like Santorini and Lanzarote combine sandy/pumice texture with geographic isolation, providing dual protection. The Colares DOC in Portugal sits on deep maritime sand dunes along the Atlantic coast northwest of Lisbon, where the sandy topsoil (chao de areia) extends meters deep above a clay substratum (chao rijo). Parts of southern France, including areas of Languedoc with sandy coastal soils, also preserved pockets of ungrafted vines. In Spain, sandy soils in regions like Toro and parts of Castilla-La Mancha allowed some pre-phylloxera plantings to survive.

• Sandy soils prevent phylloxera from forming the stable galleries needed to feed on roots
• Volcanic soils (pumice, ash, basalt) on islands provide similar protection through loose structure and isolation
• Colares' deep maritime sand dunes are the defining feature of Portugal's most famous ungrafted vineyard region

Several wine-producing regions have never been affected by phylloxera, allowing widespread own-rooted viticulture. Chile is the most significant: isolated by the Andes mountains to the east, the Pacific Ocean to the west, the Atacama Desert to the north, and Antarctic ice to the south, phylloxera has never established in Chilean vineyards. Many tens of thousands of hectares of Chilean vines remain ungrafted. Santorini in Greece, with its volcanic pumice soils and island isolation, maintains entirely own-rooted Assyrtiko vines, some over 100 years old trained in the distinctive kouloura basket shape. The Canary Islands (particularly Lanzarote and Tenerife) have volcanic soils that kept phylloxera at bay. Parts of southern Australia, including some Barossa Valley vineyards planted in the 1840s-1860s, predate phylloxera's arrival and remain ungrafted in areas where the pest never reached. Some pockets in Argentina's Mendoza region also maintain old ungrafted plantings.

• Chile is the largest phylloxera-free wine-producing country, with vast ungrafted vineyard area
• Santorini's volcanic soils and island location protect some of the world's oldest ungrafted vines
• Parts of the Barossa Valley in Australia have ungrafted vines dating to the mid-1800s
• The Canary Islands' volcanic terrain provides natural phylloxera resistance

Bollinger's Vieilles Vignes Françaises (VVF) is perhaps the most celebrated ungrafted wine in the world. Produced from 100% Pinot Noir grown on just 31 ares of ungrafted vines across two Grand Cru parcels in Ay (Clos Saint-Jacques and Chaudes Terres), these vines miraculously survived the phylloxera epidemic and are still cultivated using the traditional en foule planting method with provignage (layering). Production is extremely limited: the 2008 vintage yielded just 3,180 numbered bottles. In Colares, Portugal, producers like Adega Regional de Colares (the cooperative), Viuva Gomes, and Casal Santa Maria maintain parcels of the rare Ramisco grape, which may be the only Vitis vinifera variety never to have been subjected to grafting. In southern France, a growing movement called Les Francs de Pied connects growers who maintain ungrafted vineyards, with pockets found in Champagne, Burgundy, Bordeaux, and the Mosel. Santorini producers like Domaine Sigalas and Estate Argyros work with very old ungrafted Assyrtiko. In the Barossa Valley, vineyards like the Langmeil Freedom Shiraz (planted 1843) represent some of the oldest ungrafted plantings outside Europe.

• Bollinger VVF is produced from just 31 ares of ungrafted Pinot Noir, using traditional en foule cultivation and provignage
• Colares' Ramisco grape has potentially never been grafted in its entire history
• Les Francs de Pied is a modern association connecting ungrafted vineyard owners across France and beyond
• The Barossa Valley's oldest Shiraz plantings (1840s-1860s) are among the world's most venerable ungrafted vines

Whether ungrafted vines produce qualitatively different wines from grafted vines is actively debated. Some winemakers and researchers argue that own-rooted vines develop deeper root systems over time, access different soil nutrients, and produce wines with greater complexity and mineral expression. Others contend that modern rootstocks are essentially neutral carriers and that perceived differences reflect terroir, vine age, or winemaking rather than grafting status. One practical consideration is that rootstocks are typically selected for specific benefits: drought tolerance, vigor control, or soil adaptation. Ungrafted vines lack these tools and must be entirely compatible with their site. Interestingly, some Chilean producers have begun grafting onto rootstocks in recent decades despite having no phylloxera pressure, using rootstocks as a viticultural management tool for vigor and water uptake. The rarity and provenance of ungrafted wines certainly contributes to their perceived quality and premium pricing, whether or not a blind tasting would reliably distinguish them.

• Scientific consensus on whether own-rooted vines produce meaningfully different wine remains inconclusive
• Some producers in phylloxera-free Chile have voluntarily adopted rootstocks for viticultural management benefits
• Vine age, terroir, and winemaking style are difficult to isolate from the effect of being ungrafted
• Rarity and historical provenance clearly contribute to the premium pricing of ungrafted wines

Own-rooted vines face existential threats. Phylloxera continues to spread into previously unaffected areas, and there is no guarantee that currently phylloxera-free regions will remain so indefinitely. In Colares, urban development pressure around Lisbon has reduced vineyard area dramatically, and the region now covers a fraction of its historical extent. The sandy soils are difficult to work, and Ramisco yields are extremely low. Replanting ungrafted vineyards is far more precarious than planting grafted stock because any future phylloxera introduction would destroy the investment entirely. Climate change may also alter soil moisture patterns that currently keep phylloxera in check. Once lost, ungrafted vineyards carrying pre-phylloxera genetic material cannot be recreated, making their preservation a cultural and viticultural priority.

• Phylloxera continues to spread and could reach currently unaffected regions
• Colares' vineyard area has shrunk dramatically due to urban expansion near Lisbon
• Replanting ungrafted vines carries high risk because phylloxera introduction would destroy them
• Pre-phylloxera genetic material preserved in ungrafted vines is irreplaceable once lost