110R Rootstock — Deep-rooting; drought-tolerant; suited to dry, low-limestone terroirs

110R (Richter 110) is a grapevine rootstock bred in 1902 by Franz Richter at his Montpellier, France nursery, established in 1878. It is a cross between Vitis berlandieri cv. Rességuier n°2 and Vitis rupestris cv. Martin, two North American wild species selected for phylloxera resistance and adaptability to dry conditions. The designation follows the French nursery tradition of naming rootstocks after their breeder and selection number. Franz Richter widely promoted 110R alongside Richter 99, and their drought resistance saw them rapidly adopted across Mediterranean Europe and beyond. The cross material was originally sourced from the University of Montpellier, with Richter conducting the selection and commercialization through his prominent nursery.

• Bred by Franz Richter in 1902 at the Richter nursery, Montpellier, France, established 1878
• Parentage: Vitis berlandieri cv. Rességuier n°2 x Vitis rupestris cv. Martin
• Named after its breeder Franz Richter; the number reflects its selection within the breeding program
• 15 certified clones recognized in France, including clones 6, 7, 118, 139, 140, 151, and others

110R is the most widespread vine rootstock in Spanish viticulture and covers an estimated 130,000 ha in France, concentrated in Languedoc-Roussillon, Midi-Pyrénées, Provence-Alpes-Côte d'Azur, Rhône-Alpes, and Corsica. Its dominance in warm, dry Mediterranean regions reflects its core strengths: exceptional drought tolerance from a deep root system and very high phylloxera resistance. In Australia, it has gained increasing popularity in warm-climate regions including the Barossa Valley and McLaren Vale. The rootstock is especially valued where water access is limited and soils are poor, stony, and low in limestone, conditions typical of many of the world's most prestigious Mediterranean and warm-climate wine regions.

• Most widely planted rootstock in Spain, suited to the country's predominantly dry, low-limestone vineyard soils
• Covers approximately 130,000 ha in France, dominant in Languedoc-Roussillon, Midi-Pyrénées, and Provence
• Growing adoption in warm Australian regions including the Barossa Valley and McLaren Vale
• Relevance is increasing as climate change intensifies drought stress in traditional wine regions

110R is classified as a moderate to strong vigor rootstock. It is very well adapted to drought, primarily through its deep-rooting habit, which gives grafted vines access to subsoil moisture reserves. Scientific studies confirm that 110R has a greater number of water-conducting vessel elements than drought-sensitive stocks such as Riparia Gloire de Montpellier, explaining much of its field drought tolerance. However, it is very sensitive to excess water and performs poorly in waterlogged or poorly drained soils. It tends to delay vine maturation and the growth cycle, an important consideration when planning harvest timing. Nursery propagation is challenging due to low to moderate rooting capacity, which can lead to supply shortfalls.

• Moderate to strong vigor; delays growth cycle and ripening, especially on fertile soils
• Deep-rooting habit supports drought tolerance by accessing subsoil moisture
• Very sensitive to excess soil humidity and waterlogged conditions
• Low to moderate rooting capacity makes nursery propagation difficult, which can restrict availability

110R has broad scion affinity across most major varieties. It works particularly well with Cabernet Sauvignon, Carignan, Grenache, Mourvèdre, Tempranillo, Vermentino, and several Muscat varieties, making it versatile across Mediterranean red and white wine production. Notably, it has documented poor affinity with Syrah, and producers should exercise caution when pairing it with that variety. In warm Australian climates, it is well suited to moderate to high-potential sites in the Barossa Valley and McLaren Vale. Across Spain, its adaptability to highly variable conditions explains its position as the country's leading rootstock. Caution is required in soils with high active limestone content, as 110R has only moderate lime tolerance and is susceptible to iron chlorosis in calcareous conditions.

• Strong affinity with Cabernet Sauvignon, Carignan, Grenache, Mourvèdre, Tempranillo, and Vermentino
• Documented poor affinity with Syrah; producers should avoid this pairing
• Well suited to the Barossa Valley and McLaren Vale in Australia for warm, drought-prone sites
• Moderate lime tolerance only; avoid in soils with high active calcium carbonate content

110R's primary strengths are its very high phylloxera tolerance, reliable drought performance through deep rooting, and wide geographic adoption in Mediterranean and warm-climate viticulture. It also shows good resistance to Phytophthora cinnamomi. However, growers must understand its genuine limitations. Nematode resistance is only average for Meloidogyne incognita and Meloidogyne arenaria, meaning it is not a suitable choice for sites with significant nematode pressure. It performs very poorly in waterlogged soils and is sensitive to excess humidity even in nursery propagation. Its tendency to delay maturation and impart strong vigor can be problematic on fertile soils or in regions already challenged by slow ripening. Propagation difficulty can create supply constraints.

• Strengths: Very high phylloxera tolerance, deep rooting, strong drought adaptation, broad scion affinity
• Weaknesses: Only average nematode resistance; fails in waterlogged soils; can delay maturation on fertile sites
• Moderate lime tolerance; susceptible to iron chlorosis in high-limestone soils
• Nursery propagation is challenging, which can create supply shortfalls for growers

110R belongs to the Vitis berlandieri x Vitis rupestris family of drought-tolerant rootstocks, alongside 140 Ruggeri (140Ru) and 1103 Paulsen (1103P). Of these, 140Ru offers higher drought tolerance and better nematode resistance, while 1103P provides comparable drought performance with somewhat different vigor characteristics. By contrast, berlandieri x riparia stocks such as SO4 and 5BB are better suited to cooler, wetter conditions and offer higher lime tolerance but less drought resilience. Rootstock 99 Richter, also bred by Franz Richter in 1902, shares similar parentage but has been largely displaced by 110R in commercial plantings due to the latter's superior overall performance. Understanding the specific soil and climate profile of a site is essential before choosing 110R, as its sensitivity to waterlogging and average nematode resistance make it unsuitable for some otherwise appealing situations.

• Same berlandieri x rupestris family as 140Ru and 1103P; all three are classified as drought-tolerant
• 140Ru offers higher drought tolerance and better nematode resistance than 110R
• 99 Richter shares parentage origin but has been largely displaced by 110R in commercial use
• Contrast with SO4 and 5BB: higher lime tolerance but less drought resilience, better for cool, moist conditions